Can I re-enter Japan after a month?

So I went to Tokyo, Japan last May 2018. My family and I stayed there for only a week, it's been my second time there in Japan (First time was May 2017, went to Osaka and Tokyo).

This upcoming July 2018, I would be turning 18 and so my family thinks I can now be capable of traveling alone internationally. I plan to go back to Japan (Osaka and Tokyo).

However, I just came from Tokyo last May, can I re-enter Japan knowing I just went there a few months ago?

*I have a visa for Japan for multiple entries for 5 years, it expires at 2022.
*I visited another country after going to Japan and also stayed there for a week (South Korea) So my last international travel wasn't Japan.
*I just renewed/got my passport as I came back from Korea

There is no reason why you cannot revisit Japan unless you did something wrong. I have friends who visit Japan almost every 2 weeks without any problems.