noun
discount pass for the elderly
A booklet or card issued by some Japanese municipalities that offers discounts or benefits to elderly residents.
敬老手帳を見せると、バスの運賃が半額になります。
If you show your senior discount pass, the bus fare is half price.
Compound of 敬老 (けいろう, 'respect for the elderly') and 手帳 (てちょう, 'notebook, passbook').