We say this Nikuman. Niku means meat and man means bun.
This is JFC brand and you can buy at Asian grocery store.
We like these item and winter dish.
If you go to convenient store in Japan, you can find any time in winter.
This is frozen food and easy to heat up with microwave.
It is good for kid's snack for tea time. Tea time? Oh sorry, this is not England. We have tea time around 10am and 3pm in Japan.