Kikuchi Takeyasu: The Master of Monochrome Portraits Kikuchi Takeyasu (菊池 容斎, november 28, 1788 – june 16, 1878), also known as kikuchi yōsai and kawahara ryōhei, stands as a towering figure in Japanese art history—specifically recognized for his unparalleled skill in monochrome portraiture of historical dignitaries. Born into a samurai family in Edo (modern Tokyo), he ascended to artistic prominence through adoption by the Kikuchi cl…