B: I didn'tNo.

Usually "have you...?" is looking for a yes or no answer.

It may not be makea big a hit with foreigners as "Sengoku", but it i's also a Classic of Japanese anime classic!

A: A storyIt's about a villain who triesd to returnbring Japan back to the Showa era.

-10Ten days later

If the sentence starts with a number, you generally want to spell it out.

A: iIt's based on the motifs of Japan infrom the Showa period, so it may be difficult for foreigners to understand many of the scenes of it.

B: But that was also before you were born too, right?

A: The reason for his actions was that Shinchan who doesdidn't change,; he protected the future cause he'll wanna date withts to date many women in the future.

I understand so much aboutreally relate to wanting to go back to thosee good old days and stay the way I wereas.

But this work makes me think, like, "That’s not any good."

"Move forward...!"

Or take out the ellipses. Just ".!" is incorrect.

A: Yes, there wasere, before I was born.

It said on TV thatv the Osaka-Kansai Japan Expo will be held again in 2025.

B: I didhaven't.

If the question were: Did you see this? Then it would be an appropriate answer. You're answering the question, so you must use the same verb: Have you seen this? = I have.

It may not be make a hit with foreigners as "Sengoku", but it is also a Cclassic of Japanese anime!

A: AThe story is about a villain who tries to return to Japan toin the Showa era.

When you return somewhere, you need the preposition "to" in most cases. I returned to the supermarket; I returned to Japan. However: I returned home.

B: I watchedhave (seen it)!

This is the same as before. It's not wrong, but it doesn't correlate to the question. Have you seen it? = Yes, I have. Or: Did you watch it? = I watched it!/I did (watch it).

A: LThat's (quite) low!

It would be better to add the subject here, it sounds better. Also, you can add a quantifier like "quite" to better remark how low you think it is.

B: HThat's high!

An alternative would be: That's generous! (meaning that you are giving it a high score, so you are being very nice, generous).

A: iIt's based on the motif of Japan in the Showa period, so it may be difficult for foreigners to understand many of its scenes of it.

"Motif of Japan" could be expressed in a different way, but I don't quite know how. Other than that, instead of saying "many scenes of it", it's better to say "many of its scenes."

A: I've seen a lot of stuffit on TV and stuff.

This is just a stylistic touch: better not to put "stuff" twice in the same sentence so close to eachother. Still, it's nice to see you that you know how to use this word and stuff c:

A: The reason for hiShinchan doesn't grow up, he travels bactions was Shinchan who doesn't change, hek in time in order to protected the future cause he'll wanna date with many women in the futurwomen he will date.

This sentence doesn't make much sense, so I rephrased it based on what I understood.

I understand so much about wanting to go back to those days and to stay the wasy I wereas.

"I relate to wanting to go back to those days and for everything to be like it once was." I think this would be better understood.

But this workmovie makes me think, (like) "That’s not any good."

We can describe films and series as "works", but it's not very common. It's the same way how we would describe a portrait a work, as in "a work of art". If we wish to say, "this film is a work of art" then that is also correct. But if we're talking about a film, just say movie or film.

"Move forward.!"

A: Yes, there wasere, before I was born.

Keep the verb in the same number as before: there were places like that, weren't there? = yes, there were.

It saidw on TV thatv the Osaka-Kansai Japan Expo will be held again in 2025.

"It said on tv" isn't how we express what we hear or see on television. We usually say, "I saw the news on TV and they said it will rain tomorrow." or, "I heard on the TV that there's a new show coming out."