Spiral Pencil Boards Shitajiki

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Anime Pencil Board

  • Spiral
  • Lines of Reasoning
  • Suiri no Kizuna
    • Ayumu Narumi (鳴海歩, Narumi Ayumu)
    • Hiyono Yuizaki (結崎ひよの, Yuizaki Hiyono)
    • Eyes Rutherford (アイズ·ラザフォード)
    • Kanone Hilbert (カノン·ヒルベルト)
    • Hizumi Mizushiro (ミズシロ 火澄, Mizushiro Hizumi)
  • Imported from Japan
  • 2002




Spiral: The Bonds of Reasoning (スパイラル〜推理の絆, Supairaru: Suiri no Kizuna) is a Japanese manga series written by Kyou Shirodaira and illustrated by Eita Mizuno. 少年偵探 (Chinese (Taiwan)) 스파이럴 ~추리의 끈~ (Korean) 추리게임 뫼비우스의 띠 (Korean)

Ayumu Narumi's older brother Kiyotaka, a renowned detective and piano player, disappears all of sudden. The only clue Narumi has, are the Blade Children. Two years later a row of murders and incidents begin, relating to the Blade Children. Together with school journalist, Hiyono Yuizaki, Narumi tries to figure out their destiny.


Shitajiki (下敷き, lit. "under-sheet") is a Japanese word for various types of materials placed under a sheet of paper for writing, either to prevent marking on the sheets below or to provide a better surface for writing. They are usually referred to as pencil boards in English.

Shitajiki for handwriting are generally made of plastic about 1 to 2 mm in thickness, making them flexible but still durable. Typically, they are B5 sized (slightly smaller than U.S. letter size), although other sizes are also available (typically A4 or A5). 

Merchandised shitajiki are very common, featuring images of everything from tourist attractions and celebrities to anime and manga characters. Most shitajiki designs only go through one print run, making them highly collectible and often difficult to acquire. Collecting shitajiki is a hobby for many anime and manga enthusiasts. As collectibles, shitajiki are also often used for decoration or other ornamental purposes.