Physical appearances Edit
Kimiko usually wears ordinary, age appropriate, neat, comfortable and practical clothes. She looks good and simple.
Personality and traits Edit
Kimiko is nice, friendly and humble person. She is good and caring mother.
Behind the scenes Edit
Kimiko Yamaguchi is ancillary character.
She hasn't been named until volume 2, chapter 6, corner talk on page 21. Yazawa Ai asked readers to suggest names of Tsutomu's parents in corner talks of previous chapters. She wrote that readers sent her mountains of postcards with suggestions, from which she picked up suggestion of Marin Uchiyama from Hamamatsu City. Marin asked Yazawa Ai to give Tsutomu's mother name of her mother, Kimiko, because her mother was a big fan of Tsutomu. Yazawa Ai liked it, and she also said in the corner talk, she feels that Kimiko and Yuichirou are very compatible names.
- The Yamaguchi Family's Tsutomu-kun (First appearance)
- Favorites: Part 1
- Nice Body-ko (Only in a corner talk, where she first time was named)
- Studying Abroad in London
- To Love Someone: Part 2
- Being Adult
- 17 Years