This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This biography of a living person relies too much on references to primary sources. Please help by adding secondary or tertiary sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately, especially if potentially libelous or harmful.Find sources: "Takashi Ikegami" – news · newspapers · books · scholar · JSTOR (April 2017) (Learn how and when to remove this message)Some of this article's listed sources may not be reliable. Please help improve this article by looking for better, more reliable sources. Unreliable citations may be challenged and removed. (April 2017) (Learn how and when to remove this message) (Learn how and when to remove this message)