Contents of World Wide Malacological CATalog (Giappone)
Classification elements
| subclassis | n. | 6 |
| superordo | n. | 1 |
| ordo | n. | 9 |
| subordo | n. | 7 |
| superfamilia | n. | 34 |
| familia | n. | 59 |
| subfamilia | n. | 60 |
| tribus | n. | 4 |
| genus | n. | 186 |
| subgenus | n. | 0 |
| speciem | n. | 1362 |
| sinonim | n. | 0 |
Numbers of species included into each familia
| CLASSIS GASTROPODA | | |
| familia | hydorocenidae | 12 |
| familia | helicinidae | 27 |
| familia | hydrobiidae | 25 |
| familia | iravadiidae | 4 |
| familia | bithyniidae | 6 |
| familia | pomatiopsidae | 15 |
| familia | stenothyridae | 8 |
| familia | viviparidae | 7 |
| familia | ampullariidae | 1 |
| familia | cyclophoridae | 93 |
| familia | pupinidae | 12 |
| familia | diplommatinidae | 76 |
| familia | thiaridae | 14 |
| familia | pleuroceridae | 30 |
| familia | truncatellidae | 4 |
| familia | valvatidae | 5 |
| familia | carychiidae | 6 |
| familia | lymnaeidae | 12 |
| familia | physidae | 5 |
| familia | planorbidae | 21 |
| familia | ancylidae | 1 |
| familia | achatinellidae | 9 |
| familia | cochlicopidae | 2 |
| familia | pupillidae | 3 |
| familia | valloniidae | 4 |
| familia | vertiginidae | 32 |
| familia | strobilopsidae | 7 |
| familia | pyramidulidae | 2 |
| familia | buliminidae | 33 |
| familia | clausiliidae | 189 |
| familia | orthalicidae | 1 |
| familia | subulinidae | 12 |
| familia | achatinidae | 1 |
| familia | spiraxidae | 1 |
| familia | streptaxidae | 8 |
| familia | plectopylididae | 2 |
| familia | endodontidae | 16 |
| familia | punctidae | 16 |
| familia | discidae | 3 |
| familia | succineidae | 12 |
| familia | euconulidae | 30 |
| familia | helixarionidae | 24 |
| familia | ariophantidae | 11 |
| familia | trochomorphidae | 7 |
| familia | vitrinidae | 2 |
| familia | zonitidae | 5 |
| familia | milacidae | 1 |
| familia | limacidae | 4 |
| familia | camaenidae | 139 |
| familia | helicellidae | 1 |
| familia | bradybaenidae | 314 |
| familia | arionidae | 1 |
| CLASSIS BIVALVIA | | |
| familia | philomycidae | 8 |
| familia | margaritiferidae | 1 |
| familia | unionidae | 35 |
| familia | etheriidae | 1 |
| familia | dreissenidae | 1 |
| familia | corbiculidae | 19 |
| errors | n. | 0 |