I'd like to introduce the town Sawara to you all.all of you.

There's a beautiful town called Sawara in the Chiba prefecture.

It's a very beautiful town where there are many traditional old style Japanese buildings.

Also, there's a river called Onogawa, and streets on both sides of the river.

The streets hasve a certain air to it.

There are many traditional Japanese houses and cafes, so I'm sure it's a one of good places to visit for tourists to visit.

It's not very crowded compared to big cities like Tokyo or Osaka, so you can stroll around comfortably.

If you come to the Chiba prefecture, please visit thereis city.

The beautiful town of Sawara (23)

It's a very beautiful town whereich has many traditional, old stylefashioned Japanese buildings.

Also, there's a river called Onogawa, and a street on both sides of the river.

The street has a certain air to it.

The street has a certain feel to it.

There are many traditional Japanese houses and cafes, so I'm sure it's a one of good places to visit for tourists.

The beautiful town, Sawara

If you don't want to add "of," a comma is another option here.

I'd like to introduce the town of Sawara to you all.

ThereIt's a beautiful town called Sawara in Chiba prefecture.

You have already given us the name of it so you don't have to repeat it here. If you combine it with the next sentence, like I suggest below, you could delete this sentence.

It's a very beautiful town wherein Chiba prefecture with many traditional old style Japanese buildings.

I would combine this sentence with the previous one.

Also, there's a river called Onogawa, and streets on both sides of the river.

The other person's suggestion works, too. It is a matter of style.

The streets hasve a certain air to ithem.

You can take a train from Narita aAirport or Tokyo sStation and it takes about an hour or so to get there.

There are many traditional Japanese houses and cafes, so I'm sure it's a one of good places to visit for tourists to visit.

It's not very crowded compared to big cities like Tokyo or Osaka, so you can stroll comfortably.

At the end of the sentence, I would add where they can stroll. This isn't because of grammar, but it would be nice and you could add more detail about what it looks like.

If you come to Chiba prefecture, please visit thereSarawa.

You could also say something like "please visit this delightful city."

The beautiful town of Sawara

It's a weird thing but this is how we'd say it naturally.

I'd like to introduce the town of Sawara to you all.

There's a beautifulIt's a town called Sawara in Chiba prefecture.

It's clear Chiba is a region is the town/city is in it.

It's a very beautiful town whereith many traditional old style Japanese buildings.

traditional and old style mean almost the same thing here

Also, tThere's also a river called Onogawa, and which has streets on both sides of the river.

"Also" feels a little weird here,

The streets hasve a certain air to ithem.

TSince there are so many traditional Japanese houses and cafes, so; I'm sure it's a one of good places to visit for tourists.

tourists are always visiting so you don't have to say it

If you come to Chiba prefecture, please visit thereSawara.