Shower Room in Tenjin Fukuoka

Hi guys I will be traveling to fukuoka next week and I kinda need to find a shower room to use, preferably in tenjin.

I will be arriving at 4 pm to fukuoka airport and I will take a night bus to kagoshima at 11.45 pm from tenjin.

In the between I would like to take a bath (just normal shower type and preferably not onsen type since i'm not comfortable showering with others) since i have traveled a long time to get there

Is there a place you would like to recommend?

thanks for the kind response

There's a lounge in the domestic terminal 2 on the 3rd floor that's open to anyone who wants to pay Y1000. There are showers there for an additional Y800. It closes at 8:30 PM. I don't know if you need to show a boarding pass.

You might contact the people at Rainbow Plaza, whose office is a bit north from the Kushida Shrine or use their contact form.
https://rainbowfia.sakura.ne.jp/en/inquiry/