As an instructor at the Tokugawa bakufu's Bansho Shirabesho institute for researching Western science and technology from 1860–1868, he was one of the first Japanese to study German language and German philosophy.
Hiroyuki Sakai | Hiroyuki Sanada | Kato Olympos | Kato Hideki | Sonoko Kato | Kazuya Kato | Kato | Hiroyuki Iwatsuki | Joji Kato | Hiroyuki Takei | Hiroyuki Iwaki | Hiroyuki Hisataka | Shigeaki Kato | Ryozo Kato | Kato's conjecture | Kato Nevrokopi | Kato Kaelin | Kató Havas | Hiroyuki Konishi | Hiroyuki Asada | Yasunori Katō | Takeshi Kato | Miliyah Kato | Masato Kato | Masaru Kato | Koichi Kato | Kenzo Kato | Kazuhiko Kato (musician) | Kazuhiko Kato | Kato Hiroyuki |
Through Kato Hiroyuki and other Japanese thinkers and statesmen, his works influenced the Japanese state philosophy after the Meiji Restoration.