未知の剣
Subtitle: Rikugun tesuto pairotto no senjō
By: Watanabe Yōji
Publisher: Bungei Shunjū
Published: 2002
Place of publication: Tōkyō
Language: jpn
Number of pages: 465
Subjects: Military History
Other titles: Michi no tsurugi
Notes: Originally published as: Rikugun jikken sentōkitai. Tōkyō : Gurīn Arō Shuppansha, 1999.