Possibly Kiichiro Kibo Inouye, younger brother of Tamako Inouye.

Kameki and Toku Inouye with children Tetsumi, Tamako, Tomiko, and Kiichiro Kibo. Their youngest child, Michiko, is not pictured; she was not born until 1930. Writtten on back of photograph: "1928. Grandpa Inouye & Family. Kids: Ted, Tama, Tomi, Kibo (Mich not born)".

Kameki and Toku Inouye with five children (Tetsumi, Tamako, Tomiko, Kiichiro Kibo, and Michiko), daughter-in-law (Seiko), and grandchild (Maruko). Back row, left to right: Tetsumi, Tamako, and Tomiko. Front row, left to right: Seiko (wife of Tetsumi) with daughter Maruko on lap, Kameki, Michiko, Toku, and Kiichiro Kibo. Stamped on photograph: "Aiko". Written on back of …

Photograph taken at Nippon Kan Theatre. Written on photo: "Aiko, Seattle". Written on back of photograph: "Mom [Tamako Inouye] - front row, 4th from rt in kimono. Tomi [Tomiko Inouye, sister of Tamako] - front row - 3rd from rt. Grandma [Toku Inouye] - 2nd row - 3rd from rt. Kibo [Kiichiro Kibo Inouye, brother of …