Recommendations Novels with two way teleportation between Earth and another world.

I feel like we might need a tag for this at some point in the future, but for now I'll just manually request it. Novels like: "Jikuu Mahou de Isekai to Chikyuu wo Ittarikitari" and "Saving 80,000 Gold in an Another World for Retirement".

I'm pretty sure that there are others I'm just forgetting, but I think you get the gist of it. Also, I'm mainly focused on Japanese novels, but for inclusivity you can post other novels for people who prefer them.

 

Netooku Otoko no Tanoshii Isekai Boueki
Takarakuji de 40-oku Atattandakedo Isekai ni Ijuu Suru

 

doesn't it already exist?
Interdimensional Travel
https://www.novelupdates.com/stag/interdimensional-travel/

EDIT: it current doesn't have a definition, so you could fill it in/

 

looks like only Chinese and Korean novels seem to be using it, so I didn't see it. I wonder if we should put it on the Japanese novels. Of course, there's no definition for the tag, so I'm not sure whether it fits or not (someone who has used the tag, I leave it to you)

Edit: I haven't read any of the novels it's been used on, so I can't very well make such a judgment.

 

Kumo Desu ga, Nani ka?

But yes there are a lot more Korean ones that do this.

Kaettekite mo Fantasy!? - I think

 

Kumo can go back to her past world? '-'
(stopped after she left the cavern)

 

Yes she can in the future.

Spoiler

When she turns into a god, she can go back and forth. She also meets up with D there playing video games.

 

I Have a Mansion in the Post Apocalyptic World

 

Isekai C-mart