Meanings

closely-guarded secret

matter of the highest priority

workaholic

matters for investigation

dinner party

bribery case

office for rent

police drama (television)

militarization

detective-sergeant

introductory article

contemplation of phenomena

advance purchase excursion fare

Kanemi rice oil disease incident (of 1968)

advance purchase (e.g. fare)

advance reservation required

administrative staff

governor of a feudal domain (1869-1871)

robbery

advance reservations not required