As someone who saved this visual novel until I was close to visiting Japan in real life... to say Go Go Nippon was disappointing is a HUGE understatement.

The idea of it is nice: A short visual novel that lets you learn about some Japan tourism, and with some (hopefully) likable enough girls who teach about certain things about Japan that's practical.

However I can bullet list everything I dislike about this game (which is a lot)

-The execution of the tourist explanations is WAY too shallow, its either stuff I already know, or stuff I don't care about
-At least in the 2015 version I only get to choose 3 Areas in Tokyo before the plot forces me in Kyoto than another city, hooray for lack of choice, what if I wanted to stay in Tokyo?
-While it's nice to have animated sprites, they couldn't get voice acting for TWO characters in a ~10 hour game? Literally every other Overdrive title has voice acting for all their heroines.
-The lack of voice acting also brings down the admittedly nice feature of Go Go Nippon having the rare ability to have BOTH Japanese and English text at the same time. Voice Acting could have REALLY helped learning Japanese with the Japan infodumping if that's what they were going for.
-As far as the heroines go, Makoto was OK at best. Pleasant enough to talk to, but you can tell this is an old visual novel when she has a really lame "blissfully unaware she sucks at cooking" gimmick. One of the worst anime comedy tropes from that era.
-Akira is an incredibly obnoxious unreasonable generic tsundere. They attempt to give her "depth" in her "route" but does not exclude her behavior, and makes me wonder how the MC would come to get feelings for an unlikable POS like her.
-Speaking of routes, why did they try to force in romance here? Half or more of the dialogue is just the two sisters infodumping Japan facts and the main character is a boring white foreigner. The "routes" come in way too late, and even as someone who doesnt mind "self-inserting" this felt like cheesy lame forced quickly resolved melodrama for the final "romance route" chapters at the end of a route.
-Minor, but they should've focused more on how the characters knew each other online before the MC flew in. Maybe there wouldn't have been a dumb misunderstanding of MC not realizing the two were girls for a shallow joke. And maybe the romance would have made at least a little more sense.

I only visited areas that Akira showed me around which got me onto her route. So suffice to say did not have a good time talking with her most of the time. I don't care enough about Makoto or the areas she shows around to do her route.

When the only things I like are some of the CGs, the moving sprites, and BGM mostly being taken straight from Edelweiss, Kira Kira, and DEARDROPS (which is also half a flaw), that's not a good sign.

Go Go Nippon is both a disappointment as a Japan tourist game, and as a romance moege.