1. Species Japonia alticola (Laidlaw, 1937)
2. Species Japonia anceps Vermeulen, T.-S. Liew & Schilthuizen, 2015
3. Species Japonia balabacensis (E. A. Smith, 1895)
4. Species Japonia bauensis Marzuki, T.-S. Liew & Mohd-Azlan, 2021
5. Species Japonia borneensis (E. A. Smith, 1893)
6. Species Japonia buehleri Forcart, 1936
7. Species Japonia bunguranensis (E. A. Smith, 1894)
8. Species Japonia celebensis (P. Sarasin & F. Sarasin, 1899)
9. Species Japonia changi C.-C. Hwang, 2015
10. Species Japonia ciliocincta (E. von Martens, 1865)
11. Species Japonia citharella (A. Gould, 1859)
12. Species Japonia clathrata (Heude, 1885)
13. Species Japonia concolor (Möllendorff, 1893)
14. Species Japonia crossei (Morlet, 1886)
15. Species Japonia dido (Godwin-Austen, 1889)
16. Species Japonia ditropis Vermeulen & Junau, 2007
17. Species Japonia duplifolia C.-C. Hwang, 2015
18. Species Japonia fallax B. Rensch, 1931
19. Species Japonia formosana Pilsbry & Hirase, 1906
20. Species Japonia gouldi Kobelt, 1902
21. Species Japonia gradata (Möllendorff, 1894)
22. Species Japonia hagenmulleri (Mabille, 1887)
23. Species Japonia heteroveina C.-C. Hwang, 2015
24. Species Japonia hispida Minato, 1982
25. Species Japonia hyalina Vermeulen & Junau, 2007
26. Species Japonia inornata (E. A. Smith, 1893)
27. Species Japonia inouei Kuroda & Habe, 1961
28. Species Japonia johnabbasi Thach, 2021
29. Species Japonia jucunda (E. A. Smith, 1893)
30. Species Japonia junipervallis C.-C. Hwang, 2015
31. Species Japonia katorii Minato, 1985
32. Species Japonia keppeli (Godwin-Austen, 1889)
33. Species Japonia lanyuensis Y.-C. Lee & W.-L. Wu, 2001
34. Species Japonia mariei (Morlet, 1886)
35. Species Japonia mendicans (Mabille, 1887)
36. Species Japonia metcalfei (Issel, 1874)
37. Species Japonia mucronata (Möllendorff, 1888)
38. Species Japonia mundyana (Godwin-Austen, 1889)
39. Species Japonia musiva (A. Gould, 1859)
40. Species Japonia pngsiar C.-C. Hwang, 2015
41. Species Japonia quinquelirata (Möllendorff, 1887)
42. Species Japonia rabongensis (E. A. Smith, 1895)
43. Species Japonia sadoensis Pilsbry & Y. Hirase, 1903
44. Species Japonia saetigera (van Benthem Jutting, 1958)
45. Species Japonia shigetai Minato, 1985
46. Species Japonia striatula Kuroda, 1973
47. Species Japonia subcarinata (Möllendorff, 1887)
48. Species Japonia subconica (L. Pfeiffer, 1859)
49. Species Japonia tadai C.-C. Hwang, 2015
50. Species Japonia tenuipilis (Gredler, 1887)
51. Species Japonia thuthaoae Thach, 2021
52. Species Japonia tokunoshimana Pilsbry & Y. Hirase, 1904
53. Species Japonia trilirata (L. Pfeiffer, 1852)
54. Species Japonia trochulus (E. von Martens, 1867)
55. Species Japonia wallacei (L. Pfeiffer, 1857)
56. Subgenus Japonia (Cytora) Kobelt & Möllendorff, 1897 accepted as Cytora Kobelt & Möllendorff, 1897
    1. Species Japonia (Cytora) calva (F. W. Hutton, 1882) accepted as Cytora calva (F. W. Hutton, 1882) (superseded combination)
    2. Species Japonia (Cytora) chiltoni (Suter, 1896) accepted as Cytora chiltoni (Suter, 1896) (superseded combination)
    3. Species Japonia (Cytora) cytora (J. E. Gray, 1850) accepted as Cytora cytora (J. E. Gray, 1850) (superseded combination)
    4. Species Japonia (Cytora) fasciata (Suter, 1894) accepted as Cytora fasciata (Suter, 1894) (superseded combination)
    5. Species Japonia (Cytora) hedleyi (Suter, 1894) accepted as Cytora hedleyi (Suter, 1894) (superseded combination)
    6. Species Japonia (Cytora) hispida (Liardet, 1876) accepted as Cytora hispida (Liardet, 1876) (superseded combination)
    7. Species Japonia (Cytora) lignaria (L. Pfeiffer, 1857) accepted as Cytora lignaria (L. Pfeiffer, 1857) (superseded combination)
    8. Species Japonia (Cytora) pallida (F. W. Hutton, 1883) accepted as Cytora pallida (F. W. Hutton, 1883) (superseded combination)
    9. Species Japonia (Cytora) pannosa (F. W. Hutton, 1882) accepted as Cytora pannosa (F. W. Hutton, 1882) (superseded combination)
    10. Species Japonia (Cytora) studeri (Suter, 1896) accepted as Amnicola limosus (Say, 1817) (unaccepted > junior subjective synonym)
    11. Species Japonia (Cytora) torquillum (Suter, 1894) accepted as Cytora torquillum (Suter, 1894) (superseded combination)
57. Subgenus Japonia (Lagocheilus) W. T. Blanford, 1864 accepted as Lagocheilus W. T. Blanford, 1864
    1. Species Japonia (Lagocheilus) galatheae (Mörch, 1872) accepted as Lagocheilus galatheae (Mörch, 1872) (unaccepted combination)
    2. Species Japonia (Lagocheilus) malleatus (W. T. Blanford & H. F. Blanford, 1861) accepted as Lagocheilus malleatus (W. T. Blanford & H. F. Blanford, 1861)
    3. Species Japonia (Lagocheilus) oakesi (Godwin-Austen, 1918) accepted as Lagocheilus oakesi Godwin-Austen, 1918 (unaccepted combination)
    4. Species Japonia (Lagocheilus) polynema (Mörch, 1876) accepted as Lagocheilus polynema (Mörch, 1876) (unaccepted combination)
    5. Species Japonia (Lagocheilus) roepstorfi (Mörch, 1876) accepted as Lagocheilus roepstorfi (Mörch, 1876) (unaccepted combination)
    6. Species Japonia (Lagocheilus) sikhimensis (Godwin-Austen, 1917) accepted as Lagocheilus sikhimensis Godwin-Austen, 1917 (unaccepted combination)
    7. Species Japonia (Lagocheilus) tomotrema (W. H. Benson, 1857) accepted as Lagocheilus tomotremus (W. H. Benson, 1857) (unaccepted combination)
    8. Species Japonia (Lagocheilus) warnefordiana (G. Nevill, 1878) accepted as Lagocheilus warnefordianus G. Nevill, 1878 (unaccepted combination)
    9. Species Japonia (Lagocheilus) wuellerstorfiana (Zelebor, 1867) accepted as Lagocheilus wuellerstorfianus (Zelebor, 1867) (unaccepted combination)
58. Subgenus Japonia (Lagochilus) P. Fischer, 1885 accepted as Lagocheilus W. T. Blanford, 1864 (unaccepted rank and incorrect subsequent spelling)
    1. Species Japonia (Lagochilus) balabacensis (E. A. Smith, 1895) accepted as Japonia quinquelirata (Möllendorff, 1887) (unaccepted > junior subjective synonym)
    2. Species Japonia (Lagochilus) bangueyensis (E. A. Smith, 1895) accepted as Japonia jucunda (E. A. Smith, 1893) (unaccepted > junior subjective synonym)
    3. Species Japonia (Lagochilus) barbata (L. Pfeiffer, 1855) accepted as Lagocheilus barbatus (L. Pfeiffer, 1855) (unaccepted combination)
    4. Species Japonia (Lagochilus) baritensis E. A. Smith, 1893 accepted as Lagocheilus baritensis E. A. Smith, 1893 (unaccepted combination)
    5. Species Japonia (Lagochilus) bella (E. von Martens, 1872) accepted as Lagocheilus bellus (E. von Martens, 1873) (unaccepted combination)
    6. Species Japonia (Lagochilus) bellula (E. von Martens, 1865) accepted as Lagocheilus bellulus (E. von Martens, 1865) (unaccepted combination)
    7. Species Japonia (Lagochilus) bifimbriata (Möllendorff, 1890) accepted as Lagocheilus bifimbriatus Möllendorff, 1890 (unaccepted combination)
    8. Species Japonia (Lagochilus) binoyae (Sykes, 1899) accepted as Lagocheilus binoyae (Sykes, 1899)
    9. Species Japonia (Lagochilus) borneensis (E. A. Smith, 1893) accepted as Japonia borneensis (E. A. Smith, 1893) (unaccepted > superseded combination)
    10. Species Japonia (Lagochilus) buginensis (P. Sarasin & F. Sarasin, 1899) accepted as Lagocheilus buginensis P. Sarasin & F. Sarasin, 1899 (unaccepted combination)
    11. Species Japonia (Lagochilus) bunguranensis (E. A. Smith, 1894) accepted as Japonia bunguranensis (E. A. Smith, 1894) (unaccepted combination)
    12. Species Japonia (Lagochilus) cagayanica (Quadras & Möllendorff, 1895) accepted as Lagocheilus cagayanicus Quadras & Möllendorff, 1895 (unaccepted combination)
    13. Species Japonia (Lagochilus) celebicus (P. Sarasin & F. Sarasin, 1899) accepted as Lagocheilus celebicus P. Sarasin & F. Sarasin, 1899 (unaccepted combination)
    14. Species Japonia (Lagochilus) ciliata (G. B. Sowerby I, 1843) accepted as Lagocheilus ciliatus (G. B. Sowerby I, 1843) (unaccepted combination)
    15. Species Japonia (Lagochilus) cilifera (Mousson, 1849) accepted as Lagocheilus ciliferus (Mousson, 1849) (unaccepted combination)
    16. Species Japonia (Lagochilus) ciliocincta (E. von Martens, 1865) accepted as Japonia ciliocincta (E. von Martens, 1865)
    17. Species Japonia (Lagochilus) compressa (Möllendorff, 1894) accepted as Lagocheilus compressum Möllendorff, 1894 (unaccepted combination)
    18. Species Japonia (Lagochilus) confluens (L. Pfeiffer, 1860) accepted as Cyclotus confluens (L. Pfeiffer, 1860) (unaccepted combination)
    19. Species Japonia (Lagochilus) conica (E. von Martens, 1860) accepted as Lagocheilus conicus (E. von Martens, 1860) (unaccepted combination)
    20. Species Japonia (Lagochilus) convexa (Möllendorff, 1897) accepted as Lagocheilus convexus Möllendorff, 1897 (unaccepted combination)
    21. Species Japonia (Lagochilus) costulata (Möllendorff, 1900) accepted as Lagocheilus costulatus Möllendorff, 1900 (unaccepted combination)
    22. Species Japonia (Lagochilus) depicta (Tapparone Canefri, 1884) accepted as Lagocheilus depictus (Tapparone Canefri, 1884) (unaccepted combination)
    23. Species Japonia (Lagochilus) dido (Godwin-Austen, 1889) accepted as Japonia dido (Godwin-Austen, 1889) (unaccepted combination)
    24. Species Japonia (Lagochilus) dohertyi (Fulton, 1899) accepted as Lagocheilus dohertyi (Fulton, 1899) (unaccepted combination)
    25. Species Japonia (Lagochilus) euconus (Möllendorff, 1894) accepted as Leptopoma euconus Möllendorff, 1894 (unaccepted combination)
    26. Species Japonia (Lagochilus) euryomphala (Möllendorff, 1895) accepted as Lagocheilus euryomphalus Möllendorff, 1895 (unaccepted combination)
    27. Species Japonia (Lagochilus) exigua (E. A. Smith, 1894) accepted as Lagocheilus exiguus E. A. Smith, 1894 (unaccepted combination)
    28. Species Japonia (Lagochilus) fischeri (Morlet, 1886) accepted as Lagocheilus fischeri Morlet, 1886 (unaccepted combination)
    29. Species Japonia (Lagochilus) fornicata (L. Pfeiffer, 1854) accepted as Gonatorhaphe fornicata (L. Pfeiffer, 1854) (unaccepted combination)
    30. Species Japonia (Lagochilus) garelli (Souleyet, 1852) accepted as Lagocheilus garelli (Souleyet, 1852) (unaccepted combination)
    31. Species Japonia (Lagochilus) grandipila (O. Boettger, 1891) accepted as Lagocheilus grandipilus O. Boettger, 1891
    32. Species Japonia (Lagochilus) grandis Möllendorff, 1890 accepted as Lagocheilus grandis Möllendorff, 1890 (unaccepted combination)
    33. Species Japonia (Lagochilus) guimarasensis (G. B. Sowerby I, 1843) accepted as Lagocheilus guimarasensis (G. B. Sowerby I, 1843) (unaccepted combination)
    34. Species Japonia (Lagochilus) helicoides (G. B. Sowerby I, 1843) accepted as Lagocheilus helicoides (G. B. Sowerby I, 1843) accepted as Lagocheilus turbinatum (L. Pfeiffer, 1846)
    35. Species Japonia (Lagochilus) humilis (Möllendorff, 1897) accepted as Lagocheilus humilis Möllendorff, 1897 (unaccepted combination)
    36. Species Japonia (Lagochilus) hypselospira (Möllendorff, 1901) accepted as Lagocheilus hypselospirus Möllendorff, 1901 (unaccepted combination)
    37. Species Japonia (Lagochilus) inconspicua (P. Sarasin & F. Sarasin, 1899) accepted as Lagocheilus inconspicuus P. Sarasin & F. Sarasin, 1899 (unaccepted combination)
    38. Species Japonia (Lagochilus) inornata (E. A. Smith, 1893) accepted as Japonia inornata (E. A. Smith, 1893) (unaccepted > superseded combination)
    39. Species Japonia (Lagochilus) jucundus (E. A. Smith, 1893) accepted as Japonia jucunda (E. A. Smith, 1893) (unaccepted > superseded combination, unaccepted combination)
    40. Species Japonia (Lagochilus) keppeli (Godwin-Austen, 1889) accepted as Japonia keppeli (Godwin-Austen, 1889) (unaccepted combination)
    41. Species Japonia (Lagochilus) kinabaluensis (E. A. Smith, 1895) accepted as Japonia trilirata kinabaluensis (E. A. Smith, 1895) (unaccepted rank)
    42. Species Japonia (Lagochilus) klobukowskii (Morlet, 1885) accepted as Lagocheilus klobukowskii (Morlet, 1885) (unaccepted combination)
    43. Species Japonia (Lagochilus) landesi (Morlet, 1885) accepted as Lagocheilus landesi (Morlet, 1885) (unaccepted combination)
    44. Species Japonia (Lagochilus) laomontana (L. Pfeiffer, 1863) accepted as Lagocheilus laomontanus (L. Pfeiffer, 1863) (unaccepted combination)
    45. Species Japonia (Lagochilus) leporina (W. T. Blanford, 1865) accepted as Lagocheilus leporinus W. T. Blanford, 1865 (unaccepted combination)
    46. Species Japonia (Lagochilus) liratula (Möllendorff, 1894) accepted as Lagocheilus liratulus Möllendorff, 1894 (unaccepted combination)
    47. Species Japonia (Lagochilus) macromphala (Möllendorff, 1897) accepted as Lagocheilus macromphalus Möllendorff, 1897 (unaccepted combination)
    48. Species Japonia (Lagochilus) malleatus (W. T. Blanford & H. F. Blanford, 1861) accepted as Lagocheilus malleatus (W. T. Blanford & H. F. Blanford, 1861) (unaccepted combination)
    49. Species Japonia (Lagochilus) marangensis (Aldrich, 1898) accepted as Lagocheilus marangensis Aldrich, 1898 (unaccepted combination)
    50. Species Japonia (Lagochilus) metcalfei (Issel, 1874) accepted as Japonia metcalfei (Issel, 1874) (unaccepted combination)
    51. Species Japonia (Lagochilus) mundyana (Godwin-Austen, 1889) accepted as Japonia mundyana (Godwin-Austen, 1889) (unaccepted combination)
    52. Species Japonia (Lagochilus) natunensis (E. A. Smith, 1894) accepted as Lagocheilus natunensis E. A. Smith, 1894 (unaccepted combination)
    53. Species Japonia (Lagochilus) obliquistriata (Bullen, 1904) accepted as Lagocheilus obliquistriatus Bullen, 1904
    54. Species Japonia (Lagochilus) occulta (Sykes, 1899) accepted as Lagocheilus occultus Sykes, 1899 (unaccepted combination)
    55. Species Japonia (Lagochilus) omphalotropis (Möllendorff, 1887) accepted as Lagocheilus omphalotropis Möllendorff, 1887 (unaccepted combination)
    56. Species Japonia (Lagochilus) pachytropis (Möllendorff, 1896) accepted as Lagocheilus pachytropis Möllendorff, 1896 (unaccepted combination)
    57. Species Japonia (Lagochilus) papuana (E. A. Smith, 1897) accepted as Lagocheilus papuanus E. A. Smith, 1897 (unaccepted combination)
    58. Species Japonia (Lagochilus) parva (G. B. Sowerby I, 1843) accepted as Lagocheilus parvus (G. B. Sowerby I, 1843) (unaccepted combination)
    59. Species Japonia (Lagochilus) phayrei (Theobald, 1870) accepted as Lagocheilus phayrei (Theobald, 1870) (unaccepted combination)
    60. Species Japonia (Lagochilus) poirierii (Tapparone Canefri, 1883) accepted as Lagocheilus poirieri (Tapparone Canefri, 1883) (unaccepted combination)
    61. Species Japonia (Lagochilus) polynema (Mörch, 1876) accepted as Lagocheilus polynema (Mörch, 1876) (unaccepted combination)
    62. Species Japonia (Lagochilus) polytropis (Quadras & Möllendorff, 1895) accepted as Lagocheilus polytropis Quadras & Möllendorff, 1895 (unaccepted combination)
    63. Species Japonia (Lagochilus) quadrasi (Möllendorff, 1887) accepted as Lagocheilus quadrasi Möllendorff, 1887 (unaccepted combination)
    64. Species Japonia (Lagochilus) quadricincta E. A. Smith, 1895 accepted as Lagocheilus quadricinctus E. A. Smith, 1895 (unaccepted combination)
    65. Species Japonia (Lagochilus) quinquelirata (Möllendorff, 1887) accepted as Japonia quinquelirata (Möllendorff, 1887) (unaccepted > superseded combination, unaccepted combination)
    66. Species Japonia (Lagochilus) rabongensis (E. A. Smith, 1895) accepted as Japonia rabongensis (E. A. Smith, 1895) (unaccepted subgeneric classification)
    67. Species Japonia (Lagochilus) raripila (Morelet, 1881) accepted as Cyclophorus raripilus Morelet, 1881 (unaccepted combination)
    68. Species Japonia (Lagochilus) reticulata Möllendorff, 1897 accepted as Lagocheilus reticulatus Möllendorff, 1897 (unaccepted combination)
    69. Species Japonia (Lagochilus) roepstorfi (Mörch, 1876) accepted as Lagocheilus roepstorfi (Mörch, 1876)
    70. Species Japonia (Lagochilus) romblonensis (Möllendorff, 1897) accepted as Lagocheilus romblonensis Möllendorff, 1897 (unaccepted combination)
    71. Species Japonia (Lagochilus) scalaris (Quadras & Möllendorff, 1895) accepted as Lagocheilus scalaris Quadras & Möllendorff, 1895 (unaccepted combination)
    72. Species Japonia (Lagochilus) scissimargo (W. H. Benson, 1856) accepted as Lagocheilus scissimargo (W. H. Benson, 1856) (unaccepted combination)
    73. Species Japonia (Lagochilus) similis (E. A. Smith, 1893) accepted as Japonia jucunda (E. A. Smith, 1893) (unaccepted > junior subjective synonym)
    74. Species Japonia (Lagochilus) sirhassenensis (E. A. Smith, 1894) accepted as Lagocheilus sirhassenensis E. A. Smith, 1894 (unaccepted combination)
    75. Species Japonia (Lagochilus) smithi (Kobelt, 1897) accepted as Lagocheilus smithi Kobelt, 1897 (unaccepted combination)
    76. Species Japonia (Lagochilus) solidula (Möllendorff, 1894) accepted as Lagocheilus solidulus Möllendorff, 1894 (unaccepted combination)
    77. Species Japonia (Lagochilus) stenomphala (Möllendorff, 1890) accepted as Lagocheilus stenomphalus Möllendorff, 1890 (unaccepted combination)
    78. Species Japonia (Lagochilus) stephanophora (Möllendorff, 1895) accepted as Lagocheilus stephanophorus Möllendorff, 1895 (unaccepted combination)
    79. Species Japonia (Lagochilus) striolata (Stoliczka, 1872) accepted as Lagocheilus striolatus Stoliczka, 1872 (unaccepted combination)
    80. Species Japonia (Lagochilus) swettenhami (de Morgan, 1886) accepted as Lagocheilus swettenhami de Morgan, 1886 (unaccepted combination)
    81. Species Japonia (Lagochilus) tigrinula (Möllendorff, 1891) accepted as Lagocheilus tigrinulus Möllendorff, 1891 (unaccepted combination)
    82. Species Japonia (Lagochilus) tomotrema (W. H. Benson, 1857) accepted as Lagocheilus tomotremus (W. H. Benson, 1857) (unaccepted combination)
    83. Species Japonia (Lagochilus) townsendi (Crosse, 1879) accepted as Lagocheilus townsendi Crosse, 1879 (unaccepted combination)
    84. Species Japonia (Lagochilus) trilirata (L. Pfeiffer, 1852) accepted as Japonia trilirata (L. Pfeiffer, 1852) (unaccepted combination)
    85. Species Japonia (Lagochilus) trochoides (Stoliczka, 1872) accepted as Lagocheilus trochoides Stoliczka, 1872 (unaccepted combination)
    86. Species Japonia (Lagochilus) trochulus (E. von Martens, 1867) accepted as Japonia trochulus (E. von Martens, 1867) (unaccepted subgeneric classification)
    87. Species Japonia (Lagochilus) tumidula (Quadras & Möllendorff, 1895) accepted as Lagocheilus tumidulus Quadras & Möllendorff, 1895 (unaccepted combination)
    88. Species Japonia (Lagochilus) umbilicata (Kobelt, 1886) accepted as Lagocheilus umbilicatus (Kobelt, 1886) (unaccepted combination)
    89. Species Japonia (Lagochilus) vesca (Sykes, 1899) accepted as Lagocheilus vescus (Sykes, 1899)
    90. Species Japonia (Lagochilus) warnefordianus (G. Nevill, 1878) accepted as Lagocheilus warnefordianus G. Nevill, 1878 (unaccepted combination)
    91. Species Japonia (Lagochilus) wuellerstorfiana (Zelebor, 1867) accepted as Lagocheilus wuellerstorfianus (Zelebor, 1867) (unaccepted combination)
    92. Species Japonia (Lagochilus) tenebricosa (A. Adams & Reeve, 1848) represented as Lagocheilus tenebricosus (A. Adams & Reeve, 1848)
59. Species Japonia barbata (A. Gould, 1859) accepted as Japonia gouldi Kobelt, 1902 (junior subjective synonym)
60. Species Japonia binoyae (Sykes, 1899) accepted as Lagocheilus binoyae (Sykes, 1899) (unaccepted combination)
61. Species Japonia boonkioensis Y.-C. Lee, K.-Y. Lue & W.-L. Wu, 2008 accepted as Japonia formosana Pilsbry & Hirase, 1906
62. Species Japonia cilifera (Mousson, 1849) accepted as Lagocheilus ciliferus (Mousson, 1849)
63. Species Japonia glabrata (Möllendorff, 1886) accepted as Lagocheilus glabratus Möllendorff, 1886 (unaccepted combination)
64. Species Japonia hedigeri I. Rensch & B. Rensch, 1935 accepted as Setaepoma hedigeri (I. Rensch & B. Rensch, 1935) (original combination)
65. Species Japonia hungerfordiana (Möllendorff, 1881) accepted as Lagocheilus hungerfordianus (Möllendorff, 1881) (unaccepted combination)
66. Species Japonia janus Vermeulen & T.-S. Liew, 2022 (unaccepted > unavailable name)
67. Species Japonia longipila (Möllendorff, 1884) (unaccepted, unaccepted combination)
68. Species Japonia michaui (Crosse & P. Fischer, 1863) (unaccepted, unaccepted combination)
69. Species Japonia monggisensis Vermeulen & T.-S. Liew, 2022 (unaccepted > unavailable name)
70. Species Japonia occulta (Sykes, 1899) (unaccepted, unaccepted combination)
71. Species Japonia pellicosta (Möllendorff, 1882) (unaccepted, unaccepted combination)
72. Species Japonia pilosa (Möllendorff, 1884) (unaccepted, unaccepted combination)
73. Species Japonia poirierii (Tapparone Canefri, 1883) (unaccepted, unaccepted combination )
74. Species Japonia propria (Fulton, 1905) (unaccepted > junior subjective synonym)
75. Species Japonia sexfilaris (Heude, 1882) (unaccepted, unaccepted combination)
76. Species Japonia sirhassenensis (E. A. Smith, 1894) (unaccepted, unaccepted combination)
77. Species Japonia subrudis Vermeulen & T.-S. Liew, 2022 (unaccepted > unavailable name)
78. Species Japonia tambunanensis Vermeulen & T.-S. Liew, 2022 (unaccepted > unavailable name)
79. Species Japonia toshimana Pilsbry & Y. Hirase, 1904 (unaccepted, junior synonym)
80. Species Japonia trichophora (Möllendorff, 1881) (unaccepted, unaccepted combination)
81. Species Japonia vesca (Sykes, 1899) (unaccepted)
82. Species Japonia zebra Pilsbry & Y. Hirase, 1906 (unaccepted, original combination)
83. Subgenus Japonia (Japonia) A. Gould, 1859 (alternative representation)
    1. Species Japonia (Japonia) citharella (A. Gould, 1859) accepted as Japonia citharella (A. Gould, 1859) (superseded combination)
    2. Species Japonia (Japonia) glabrata (Möllendorff, 1886) accepted as Lagocheilus glabratus Möllendorff, 1886 (unaccepted combination)
    3. Species Japonia (Japonia) hungerfordiana (Möllendorff, 1881) accepted as Lagocheilus hungerfordianus (Möllendorff, 1881) (unaccepted combination)
    4. Species Japonia (Japonia) longipila (Möllendorff, 1884) accepted as Lagocheilus longipilus Möllendorff, 1884 (unaccepted combination)
    5. Species Japonia (Japonia) michaui (Crosse & P. Fischer, 1863) accepted as Lagocheilus michaui (Crosse & P. Fischer, 1863) (unaccepted combination)
    6. Species Japonia (Japonia) pellicosta (Möllendorff, 1882) accepted as Lagocheilus pellicosta (Möllendorff, 1882) (unaccepted combination)
    7. Species Japonia (Japonia) pilosa (Möllendorff, 1884) accepted as Lagocheilus pilosus Möllendorff, 1884 (unaccepted combination)
    8. Species Japonia (Japonia) sexfilaris (Heude, 1882) accepted as Lagocheilus sexfilaris (Heude, 1882) (unaccepted combination)
    9. Species Japonia (Japonia) subconica (L. Pfeiffer, 1859) accepted as Japonia subconica (L. Pfeiffer, 1859)
    10. Species Japonia (Japonia) trichophora (Möllendorff, 1881) accepted as Lagocheilus trichophorus (Möllendorff, 1881) (unaccepted combination)
    11. Species Japonia (Japonia) clathrata (Heude, 1885) represented as Japonia clathrata (Heude, 1885)
    12. Species Japonia (Japonia) concolor (Möllendorff, 1893) represented as Japonia concolor (Möllendorff, 1893)
    13. Species Japonia (Japonia) crossei (Morlet, 1886) represented as Japonia crossei (Morlet, 1886)
    14. Species Japonia (Japonia) gouldi Kobelt, 1902 represented as Japonia gouldi Kobelt, 1902 (basionym)
    15. Species Japonia (Japonia) gradata (Möllendorff, 1894) represented as Japonia gradata (Möllendorff, 1894)
    16. Species Japonia (Japonia) hagenmulleri (Mabille, 1887) represented as Japonia hagenmulleri (Mabille, 1887)
    17. Species Japonia (Japonia) mariei (Morlet, 1886) represented as Japonia mariei (Morlet, 1886)
    18. Species Japonia (Japonia) mendicans (Mabille, 1887) represented as Japonia mendicans (Mabille, 1887)
    19. Species Japonia (Japonia) mucronata (Möllendorff, 1888) represented as Japonia mucronata (Möllendorff, 1888)
    20. Species Japonia (Japonia) musiva (A. Gould, 1859) represented as Japonia musiva (A. Gould, 1859)
    21. Species Japonia (Japonia) subcarinata (Möllendorff, 1887) represented as Japonia subcarinata (Möllendorff, 1887)
    22. Species Japonia (Japonia) tenuipilis (Gredler, 1887) represented as Japonia tenuipilis (Gredler, 1887)
84. Subgenus Japonia (Mylicotrochus) P. Sarasin & F. Sarasin, 1899 represented as Japonia A. Gould, 1859
    1. Species Japonia (Mylicotrochus) celebensis (P. Sarasin & F. Sarasin, 1899) represented as Japonia celebensis (P. Sarasin & F. Sarasin, 1899)

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