Business
Wasei-eigo in the Business category — 6 words that look English but mean something completely different in Japanese.
アフターサービス
afutā sābisu
Post-purchase customer support (warranty repairs, inspections, help-desk inquiries) ≠ after service
クレーム
kurēmu
A customer complaint or grievance ≠ claim
コストダウン
kosuto daun
Cost reduction / cost cutting (manufacturing or operational) ≠ cost down
コストパフォーマンス
kosuto pafōmansu
Value for money / cost-effectiveness (often shortened to コスパ) ≠ cost performance
フリーダイヤル
furī daiyaru
A toll-free phone number (starting with 0120 or 0800) ≠ free dial
プラスアルファ
purasu arufa
A little extra / a bonus / above and beyond a stated amount ≠ plus alpha