冒険ターザン [Tarzan's Adventures]
漫画新人王入選者 [Artist debut]. Matsumoto was 15 when he completed this story. See http://blog.livedoor.jp/leiji_site/archives/5020700.html.
漫画新人王入選者 [Artist debut]
See chapters at http://tezukainenglish.com/wp/?page_id=721.