Mr.

Masakatsu Iwamoto , known professionally as Mr., is a Japanese contemporary artist, based in Saitama Prefecture, Japan. A former protégé of Takashi Murakami, Mr.'s work debuted in both solo and group exhibitions in 1996, and has since been seen in museum and gallery exhibitions in Tokyo, Osaka, Nagoya, Hong Kong, Seoul, Daegu, Paris, New York, Minneapolis, Chicago, Miami, Jerusalem, Los Angeles, and London.