1.
hitting against a wall; wall practice
practicing a ball sport by hitting or throwing a ball against a wall, typically done alone as training
毎日壁打ちで練習している。
I practice by hitting against a wall every day.
テニスの壁打ちは一人でもできるいい練習法だ。
Wall hitting in tennis is a good practice method you can do alone.
相手がいないときは壁打ちでフォームを確認するようにしている。
When I don't have a partner, I check my form by practicing against a wall.
2.
talking to oneself; brainstorming alone; bouncing ideas off a wall
figuratively, the act of working through ideas or problems without a real conversation partner, as if hitting a ball against a wall
AIと壁打ちしてみた。
I tried bouncing ideas off an AI.
アイデアの壁打ちに付き合ってくれない？
Would you help me brainstorm some ideas?
企画を提出する前に、同僚と壁打ちして内容を練った。
Before submitting the proposal, I bounced ideas off a colleague and refined the content.
Originally a sports term for solo practice by hitting a ball against a wall (tennis, squash, baseball). In recent years, the figurative sense of brainstorming or testing ideas has become very common in business and tech contexts, especially with the rise of AI chatbots being used as a "wall" to bounce ideas off of.
COMMON COLLOCATIONS:
- 壁打ちの相手: brainstorming partner (literally "wall-hitting partner")
- 壁打ち練習: wall-hitting practice
- AIと壁打ちする: to brainstorm with AI
- 壁打ちに付き合う: to help someone brainstorm
SIMILAR WORDS:
- ブレインストーミング: brainstorming — the English loanword, used for structured group ideation
- 素振り: practice swings — solo practice of swinging a bat or racket without a ball
- 自問自答: self-questioning — asking and answering one's own questions internally