Describes something that is legally, functionally, or practically valid, effective, or in force. Common in official, technical, and everyday contexts. Antonym: 無効 (invalid).
Antonyms: 無効
この切符は明日まで有効です。
This ticket is valid until tomorrow.
The new law will take effect next month.
yuko (judo)
A scoring term in judo, awarded for a technique that partially meets the criteria for an ippon. Now obsolete in official IJF rules, but still encountered in older contexts or casual reference.
He scored a yuko with an osoto gari.
This coupon is valid until the end of next month.
This vaccine is effective against the new strain of the virus as well.
This ticket is valid at any movie theater nationwide.
This passport is valid for ten years.
scoping unit
validity; effectiveness