[citation needed] He painted numerous works with themes from Japanese mythology and ancient Indian tales, enchanting the people of the time with rich expressiveness and creativity.

First Aoki studied with Koyama Shōtarō, who himself was pupil of the Italian foreign advisor Antonio Fontanesi, who had been hired by the Meiji government in the late 1870s to introduce western oil painting to Japan.

After his return, he displayed some of his completed works at Kuroda's 8th Hakuba-kai Exhibition, where his use of the techniques of the Pre-Raphaelite Brotherhood combined with themes from the Kojiki resulted in great critical acclaim.

It is said that he had observed the land shapes and the customs of the surrounding area and they became reflected with wild brush strokes using his brilliant ability of imagination and creativity, in a work filled with his youthful energy.

[3] After his completed university studies and a one and a half months sketching trip to Chiba, he relocated to what is now Chikusei, Ibaraki, where he had a son by his common law wife Tane Fukuda.