^Zhèng Shùn-gōng / Tei Shunkō (auth.), MIKAJIRI Hiroshi (ed.) Nihon Ikkan. [Unnamed place]:[Unnamed editor], 1937, pp. 482-3. KATAYAMA Harukata. “Nihon Ikkan no Kiso teki Kenkyū, Sono ichi.” In: Komazawa Tanki Daigaku Kenkyū Kiyō, 24, 15. 1997; KATAYAMA Harukata. “Nihon Ikkan no Kiso teki Kenkyū, Sono ni.” In: Komazawa Tanki Daigaku Kenkyū Kiyō, 24, 17. 1998; YONETANI Hitoshi. “Kōki Wakō kara Chōsen Shinryaku he.” In: IKE Susumu (ed.). Tenka Tōitsu to Chōsen Shinryaku. Tokyo: Yoshikawa Kōbunkan, 2003, pp. 146-7.
^Jesuits and the Problem of Slavery in Early Modern Japan, Rômulo da Silva Ehalt, 2017. p. 282, "Forced labor was a sub product of these struggles, and the Japanese slave market became dependent not only on Chinese and Koreans captured by Wakō, but also on servants captured domestically."
^See YONETANI Hitoshi. “Kōki Wakō kara Chōsen Shinryaku he.” In: IKE Susumu (ed.). Tenka Tōitsu to Chōsen Shinryaku. Tokyo: Yoshikawa Kōbunkan, 2003, pp. 146-7.
^Peter C. Mancall, ed (2007). The Atlantic World and Virginia, 1550-1624 (illustrated ed.). UNC Press Books. p. 228. ISBN 080783159X
^MATSUDA Kiichi. Tenshō Ken’ō Shisetsu. Tokyo: Chōbunsha, 1991, pp. 274-5
^ abJesuits and the Problem of Slavery in Early Modern Japan, Rômulo da Silva Ehalt, 2017. p. 366, "First, it is important to consider the format chosen by the missionaries. As Nina Chordas explains, early modern dialogues were a quasi-fictional genre, in the sense that they insisted on being accepted as an entity “with some agency in the actual, material world”. As a literary genre, the dialogue was the result of a “general distrust of imaginative literature” in the late Renaissance, thus offering an alternative for seducing the rational mind.1151 These texts were, as pointed by Jon R. Snyder, “never transcriptions of conversations or debates that actually occurred (although this is one of their enabling fictions); no unmediated traces of orality can be discovered in dialogue, except in the form of carefully constructed illusion.”1152"
^ abJesuits and the Problem of Slavery in Early Modern Japan, Rômulo da Silva Ehalt, 2017. p.346
^ CRUZ, Frei Gaspar da (auth.) and LOUREIRO, Rui Manuel (ed.). Tratado das Coisas da China (Évora, 1569-1570). Lisbon: Biblioteca editores Independentes, 2010, p. 177.