Born in Fukuoka, Japan 1977. After spending his youth in New Zealand, he graduated with a bachelor in product design in Auckland. In 1999 during his study, he moved to Paris for a scholarship study at ENSCI / Les Ateliers.
In 2003 he returned to Japan and since 2005 he has been a member and a designer at Naoto Fukasawa Design ltd in Tokyo.
In 2012 Takeuchi decided to set up a satellite office for Fukasawa in Milan. In 2015 he established KEIJI TAKEUCHI SRLS in Milan.
He received Elle Decor young Japanese design talent award in 2016 (Elle Decor Japan). He also acted as a Juror for Singapore Design Award 2017. Today he collaborates with various international brands such as Soffi, De Padova, Geiger I HermanMiller, Amorim, Antolini, lndustry+ and others.
In 2016 he designed for Boffi the Twig bathroom accessories. In 2018 a new washbasin: Floe.