From Iā̆pōnia (“Japan”) + -us.
iā̆pōnus (feminine iā̆pōna, neuter iā̆pōnum); first/second-declension adjective
First/second-declension adjective.
Number | Singular | Plural | |||||
---|---|---|---|---|---|---|---|
Case / Gender | Masculine | Feminine | Neuter | Masculine | Feminine | Neuter | |
Nominative | iā̆pōnus | iā̆pōna | iā̆pōnum | iā̆pōnī | iā̆pōnae | iā̆pōna | |
Genitive | iā̆pōnī | iā̆pōnae | iā̆pōnī | iā̆pōnōrum | iā̆pōnārum | iā̆pōnōrum | |
Dative | iā̆pōnō | iā̆pōnō | iā̆pōnīs | ||||
Accusative | iā̆pōnum | iā̆pōnam | iā̆pōnum | iā̆pōnōs | iā̆pōnās | iā̆pōna | |
Ablative | iā̆pōnō | iā̆pōnā | iā̆pōnō | iā̆pōnīs | |||
Vocative | iā̆pōne | iā̆pōna | iā̆pōnum | iā̆pōnī | iā̆pōnae | iā̆pōna |