JMdict entry #2258110

1. noun (common) (futsuumeishi) folding book
2. counter counter for units of paper and nori (48 pages of Mino paper; 20 pages of hanshi; 10 sheets of nori)
3. counter counter for folding books, folding screens, shields, etc.
4. counter counter for pairs (of curtains)
5. counter counter for tatami mats
   see: 畳・じょう