Later some scholars accepted the dichotomy positively, and Takuya TAMAGAMI divided the first part into two groups: the former group is from 'Kiritsubo' to 'Fuji no Uraba,' and the latter group is from 'Wakana' to 'Maboroshi'; Kikan IKEDA took these two ideas into consideration and claimed a new theory of a three-part structure in which the first part is from 'Kiritsubo' to 'Fuji no Uraba,' the second part is from 'Wakana' to 'Maboroshi' and the third part is from 'Niou Hyobukyo' to 'Yume no Ukihashi.'
その後の何人かの学者はこのはこの2つの二分法をともに評価し、玉上琢弥は第一部を「桐壺」から「藤裏葉」までの前半部と、「若菜」から「幻」までの後半部に分け、池田亀鑑は、この2つを組み合わせて『源氏物語』を「桐壺」から「藤裏葉」までの第一部、「若菜」から「幻」までの第二部、「匂兵部卿」から「夢浮橋」までの第三部の3つに分ける三部構成説を唱えた。