Kyosuke Chinai is from Imabari in Ehime, Shikoku. I lived on Shikoku for almost three years in my early to mid twenties. There is precious little information about him on the Net in English. I bought a book of his paintings, and it is still one of those treasured items that I take with me whenever I move around. I am fairly certain that his daughter used to be, or is the model in his paintings. If you can read Japanese, I think there is some information here, though it might be mostly about the opening of an art museum. Even though the fourth painting above seems to be credited to him, it doesn't really seem to be his style, so apologies if I have misappropriated credit.
