The Japanese word for magazine is
雑誌

ざっし - zasshi
雑-miscellaneous (zatsu), 誌-document (shi)

Japanese Definition

弾倉
1. n. magazine (ammunition clip)

雑誌
1. n. a journal (newspaper or magazine)
(ja-x, 医%学雑%誌, い%がくざっ%し, a medical journal)
(ja-x, S%F 雑%誌, エス%エフざっ%し, a sci-fi magazine)
(ja-x, 科%学雑%誌, か%がくざっ%し, a scientific journal)
(ja-x, 学%術雑%誌, がく%じゅつざっ%し, an academic journal)
(ja-x, 同%人雑%誌, どう%じんざっ%し, a fanzine)
(ja-x, 婦%人雑%誌, ふ%じんざっ%し, a women's magazine)