How to say "inventory" in Japanese

• 在庫ざいこJLPT N1approx.Common
  nounCovers 'inventory' as the goods a shop or company holds for sale — stock on hand. Typical when discussing how much of a product a store has or whether an item is in stock.
  申し訳もうしわけありませんが、在庫ざいこがありません。↗

  I'm afraid we are out of stock.
• ストックCommon
  nounLoanword covering the same stock-of-goods sense as 在庫, so the two overlap considerably in business contexts. It is also used more broadly for any reserve supply kept on hand for later use.
  一生懸命いっしょうけんめい磨みがきました。困こまったのは、意外いがいと低級ていきゅう宝石ほうせきのストックがないことです。↗

  I polished for all I was worth. The trouble is that my stock of low-grade gems was surprisingly low.
• 目録もくろくJLPT N1approx.Common
  nounTakes 'inventory' as a written list or catalogue of items, as in a library catalogue or an inventory of holdings. Not the word for goods held in stock — use 在庫 for that.
  ７月がつ２２日にち付つけのお手紙てがみにつきまして私共どもの最新さいしんの目録もくろくを同封どうふうします。↗

  With regard to your letter of July 22nd, I enclose our most recent catalogue.

For goods a business holds in stock, use 在庫 or the loanword 「ストック」, which overlap; reserve 目録 for 'inventory' meaning a written list or catalogue of items rather than the goods themselves.

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

• 在庫ざいこstock
• ストックstock
• 目録もくろくcatalogue
• インベントリーinventory
• 在庫品ざいこひんinventory
• 商品目録しょうひんもくろくinventory
• 棚卸資産たなおろししさんinventory
• 棚卸表たなおろしひょうinventory
• 品書きしながきcatalog
• 登録簿とうろくぼdirectory
• 貯蔵物ちょぞうぶつstores