Mako was born in Kobe, Japan, the son of noted children's book author and illustrator Taro Yashima. His parents moved to the United States when he was a small child. He joined them there after World War II, in 1949, joining the military in the 1950s. He became a naturalized American citizen in 1956. When Mako first joined his parents in the USA, he studied architecture. During his military service, he discovered his theatrical talent, and trained at the Pasadena Community Playhouse. Mako was married to actress Shizuko Hoshi with whom he had two daughters (both are actresses) and three grandchildren.

Mako se narodil v japonském Kóbe jako syn známého autora dětských knih a ilustrátora Taro Jašimy. Když byl malý, jeho rodiče se přestěhovali do Spojených států. Po druhé světové válce, v roce 1949, se k nim připojil a v padesátých letech vstoupil do armády. V roce 1956 se stal naturalizovaným americkým občanem. Když se Mako poprvé připojil k rodičům v USA, studoval architekturu. Během vojenské služby v sobě objevil divadelní talent a trénoval v Pasadena Community Playhouse. Mako byl ženatý s herečkou Shizuko Hoshi, s níž měl dvě dcery (obě jsou herečky) a tři vnoučata.

岩松信（1933年12月10日－2006年7月21日）（日文名：マコ 岩松 ，英文名：Makoto "Mako" Iwamatsu），出生于日本神户市，出名于美国的日裔美籍演员。

岩松信的父亲是儿童书作者和插画家。孩提时随父母移居美国，二战结束之后的1949年，他也来到了美国并和父母相聚。1950年代，他加入美军，1956年成为美国公民。

早年学习建筑，当他在美国陆军服役时，军方发现他是一个戏剧天才，于是送他在帕萨迪纳社区剧场进行培训。

2006年7月21日，因食道癌在美国加州洛杉矶病逝。

Mako nasceu em Kobe, Japão, filho do famoso autor de livros infantis e ilustrador Taro Yashima. Seus pais se mudaram para os Estados Unidos quando ele era criança. Ele se juntou a eles lá após a Segunda Guerra Mundial, em 1949, ingressando no exército na década de 1950. Ele se naturalizou cidadão americano em 1956. Quando Mako foi morar com seus pais nos Estados Unidos, ele estudou arquitetura. Durante o serviço militar, ele descobriu seu talento teatral e treinou no Pasadena Community Playhouse. Mako foi casado com a atriz Shizuko Hoshi, com quem teve duas filhas (ambas são atrizes) e três netos.