Rohan KODA completed a commentary on the Basho Shichibushu (the Canonical Collection of Haikai from the Basho School), in which he laid bare the compositional style of Basho's kasen (36-verse renku).
また、幸田露伴は、芭蕉七部集の評釈を行い、芭蕉の歌仙の構造を明らかにした。