Password Puzzle Sengoku Jidai (Kodansha Aoi Tori Bunko)

[Machine Translation] Mako and the other members of the Electronic Detective Agency are invited to participate in the TV program "Puzzle Sengoku Jidai," in which a team of selected detectives from all over Japan compete in a series of puzzle competitions. However, in the middle of the competition, their opponent is kidnapped! What was waiting for them in the destination indicated by the code that was left behind... Sixteen pairs of local detective teams will appear! 94 unique local problems! How many problems can you solve? From intermediate level of elementary school.

全国各地から集められた選りすぐりの探偵団がパズル勝負をくりひろげる―というテレビ番組「パズル戦国時代」に招待されたマコトたち電子探偵団。しかし、大会の途中で対戦相手がさらわれてしまった!残された暗号が指ししめす先にまっていたのは...。16組のご当地探偵団が登場!その土地ならではのユニークな問題が94問!君は何問解けるかな?小学中級から。