Matsuda Teisho and Koga Harue were both born in Kurume. Seven years older than Koga, Matsuda was Koga’s art teacher. Koga won the Nika Prize at the ninth Nika Exhibition in 1922 and proceeded as an avant-garde artist. Meanwhile, Matsuda remained in Kurume and chose to pursue a career in bringing up the next generation. Koga looked up to Matsuda as if he were an elder brother and looked forward to going on sketching excursions with him. The works on display focus on the relationship between these two painters. There is also mention of associating with Ishibashi Shojiro in Matsuda’s diary. Most of Koga’s works were purchased by Shojiro on the occasion of the opening of the Ishibashi Museum of Art in 1956.