書架|しょかshoka[1]atamadaka (head-high)

1. nounbookshelf; bookcase
   書架しょかの本ほんは１冊さつ残のこらず全部ぜんぶ読よみました。↗

   I have read every book on the shelf.

• Synonym本棚ほんだなNeutralThe everyday word for a bookshelf, fine in both speech and writing; 「書架」 sounds more written and turns up mostly in library contexts.
• Synonym書棚しょだなWrittenSame meaning as 「書架」, with a slightly old-fashioned feel; found mainly in written description.
• Synonym本箱ほんばこNeutralA bookcase with doors or a box-style unit; somewhat old-fashioned and less common than 「本棚」.
• SynonymブックケースNeutralA loanword for a book cabinet or shelf, with or without doors; common in product names, rare in everyday speech.

Say 「本棚」 in everyday use. 「書架」 is the more written word, typical of library and bookstore shelving, as in 「開架書架」; 「書棚」 is a close, slightly dated synonym. 「ブックケース」 appears in product names, 「本箱」 for door or box-style cases.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 本棚ほんだな。