He moved to Japan by himself, where he was befriended by Ōkuma Shigenobu, Futabatei Shimei, Torii Ryūzō, Katayama Sen, and others, and helped an organisation of anti-imperial Russian refugees.
In 1878 Katayama travelled to Tokyo to apprentice as a printer while he studied at a small preparatory school, the Oka Juku, where he formed a friendship with Iwasaki Seikichi (岩崎 清吉), nephew of one of the founders of Mitsubishi.
Sun Yat-sen | Amartya Sen | Mrinal Sen | Hun Sen | Sun Yat-sen University | Sen. | Konkona Sen Sharma | Aparna Sen | Suchitra Sen | Sen Sōtan | Sen no Rikyū | Sen Dog | Nabaneeta Dev Sen | Chau Sen Cocsal Chhum | Sun Yat-sen Mausoleum | Sun Yat-Sen | Sen Dōan | Sen | Rimi Sen | Riddhi Sen | Ramprasad Sen | Pranab K. Sen | Partho Sen-Gupta | National Sun Yat-sen University | Kyoichi Katayama | Keshab Sen | Ivan Sen | Hon Sui Sen | Yutaka Katayama | Yoshimi Katayama |