How to say "supplier" in Japanese

• サプライヤーCommon
  nounThe direct loanword for 'supplier': a company that provides goods, parts, or materials to another business. Natural in business and manufacturing contexts.
• 仕入れ先しいれさきCommon
  nounThe firm you purchase your goods from, viewed from the buyer's side. Natural when a shop or business talks about where it sources its stock.
• 業者ぎょうしゃJLPT N1approx.Common
  nounReally a general word for a trader, dealer, businessperson, or company, not a dedicated term for 'supplier'. It only loosely covers the supplier sense when context makes the supplying role clear.
  あぶく銭ぜにを稼かせごうとする開発業者かいはつぎょうしゃたちよ。↗

  They're some developers who aim to make a fast buck!

Use 「サプライヤー」 for a supplier in general, 「仕入れ先」 for the firm you buy stock from (the buyer's side), and 業者 only loosely, since it really means a trader, dealer, or company.

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

• サプライヤーsupplier
• 仕入れ先しいれさきsupplier
• 業者ぎょうしゃtrader
• 供給者きょうきゅうしゃsupplier
• 納入会社のうにゅうがいしゃsupplier (company)
• 納入業者のうにゅうぎょうしゃsupplier
• 納入者のうにゅうしゃsupplier
• 調達先ちょうたつさきsupplier
• 提供元ていきょうもとoriginal source