Hello jazz,
This is a rather difficult order in Kyoto for kaiseki. I talked to several kaiseki restaurants and they were not interested.
Chef Tanigawa at Kichisen said that for children up to about 12 years of age, accompanied by two adults, he would offer a children’s menu. It would be 5,000 yen per child and be mainly meat based. A three course meal with donburi (rice bowl), Japanese style hamburger (hamba-gu) and another dish. The meal will be ‘omakase’ (left to the discretion of the chef).