Watch Okura: Cold Case Investigation Season HD Full Free on solarmovie.do. Watch Okura: Cold Case Investigation tv series online free. Two detectives from different eras, warm-hearted Hidaka and cool Fuwa, team up in the "Okra" departm...Two detectives from different eras, warm-hearted Hidaka and cool Fuwa, team up in the "Okra" department to solve long-unsolved cold cases, utilizing their generational gap to unravel the truth behind each mystery using the slightest clues.