Who is Michiya Ogawa?

Michiya Ogawa was Dr.Kensuke Ogawa's son whom he thought to have died during the landing of an atomic bomb in Nagasaki, Japan. This was from Michael Morpurgo's book : KENSUKE'S KINGDOM. You should definitely read the book, at the back, it has a letter from Michiya Ogawa saying that he survived the Nuclear Bomb, they soon met up.

Michiya went to meet his grandmother, since then Michiya had no memorys of Dr.Kensuke.

3 Years before the mail, Kimi Ogawa had died.