

新しい商品の販売は大成功でした。
プロジェクトの成功をみんなで祝いました。
成功の理由は何だと思いますか。
"せいこう(成功)" is in the lesson "Accounting" (Level 41), along with 12 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.