Masaji Ishikawa or Do Changsun is a North Korean defector and author on Zainichi heritage.
Ishikawa was thirteen years old when he moved from Japan to North Korea in 1960.
Ishikawa later defected from North Korea in 1996 via the Yalu river, leaving behind three children and a spouse.
[1] In 2000, Ishikawa published his memoirs in Japan under the title 北朝鮮大脱出地獄からの生還 and the nom de plume Shunsuke Miyazaki (宮崎 俊輔).
[8] The part of the book focused on the river crossing was published in Literary Hub.