hiː ɐdvˈænst ðə stˈʌdi ʌv bˈɑːtəni ɪn dʒəpˈæn wɛn hiː ɹˈoʊt jæmˈɑːɾoʊ hˈɑːnzoʊ mədˈɪsɪnəl ˈɜːbz ʌv dʒəpˈæn, wˌɪtʃ wʌzɐ sˈɛmɪnəl stˈʌdi ʌv dʒˌæpənˈiːz plˈænts.
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.