Tsukku

Tsukku is a Christian priest whose teaching and requested language books place him at the meeting point of religious instruction, political authority, and communication with Blackthorne. Though he appears only through others’ references, his influence is tangible: Naga has studied Christianity under him, Toranaga seeks books from him for Blackthorne, and his sudden departure from Osaka adds uncertainty to an already urgent political situation.

Identity and Role

Tsukku is identified as a priest and as a source of Christian instruction. Naga says he spent time trying to learn from Tsukku, but found his teaching to consist of dogma and rules he considered incompatible with samurai life. Naga objects in particular to Christian prohibitions against killing and taking more than one woman. His account establishes Tsukku as a teacher, while also showing that instruction has not produced belief: Naga says he could obey Toranaga’s orders but could not believe the faith.

Language Books for Blackthorne

When Mariko tells Toranaga that Blackthorne badly needs a grammar book and dictionary, Toranaga says he has sent to Tsukku for them. Mariko expects Tsukku to obey, but cautions that he may not act as quickly as Toranaga would like. The exchange makes Tsukku a possible intermediary in Blackthorne’s language learning, while leaving the books’ actual delivery unconfirmed. Toranaga’s attention to the delay gives the request a political urgency beyond ordinary study: communication with Blackthorne matters to the ruler’s plans.

Departure from Osaka

A later report says Tsukku secretly left Osaka five days earlier. A Christian spy at the Black Robes’ headquarters had revealed the departure, but the report could not establish whether Tsukku had gone to Yedo or Nagasaki. The uncertainty is sharpened by news that the Black Ship is expected unusually early, perhaps within twenty or thirty days. Tsukku’s whereabouts therefore remain unresolved at a moment when the movement of priests, information, and trade is politically consequential; the available account does not say whether he reaches either destination or sends the requested books.