He advanced the study of botany in Japan when he wrote Yamato honzō (Medicinal herbs of Japan), which was a seminal study of Japanese plants.
hiː ɐdvˈænst ðə stˈʌdi ʌv bˈɑːtəni ɪn dʒəpˈæn wɛn hiː ɹˈoʊt jæmˈɑːɾoʊ hˈɑːnzoʊ mədˈɪsɪnəl ˈɜːbz ʌv dʒəpˈæn, wˌɪtʃ wʌzɐ sˈɛmɪnəl stˈʌdi ʌv dʒˌæpənˈiːz plˈænts.