As the last of Japan's baby boomers turn 65 this year and retire, many are taking low-paid or voluntary work to get them out of the house — a trend that could have broad-reaching effects.

The transition came later than expected as many workers from the cohort, born from 1947 to 1949, chose to remain in full-time work rather than retire when they turned 60.

In the city of Kashiwa, Chiba Prefecture, Hiroshi Ishida, 66, is teaching students at a private tutoring school how robots work. Until five years ago, Ishida was employed in the software development industry. After retiring, Ishida decided he should use his experience to help the younger generation.