nin'isentakukōseiyō sode
1. Optional constituent
Noun
1. Optional constituent
1. optional; voluntary
2. arbitrary
1. choice; selection
1. antibiotic
1. employee welfare; employee benefits
1. welfare pension
1. washing; laundry
2. relaxation; rejuvenation
1. Corporate Reorganization Act
1. elective subject or course
1. laundry; the washing