I’m planning to my summer vacation. I’m planning my summer vacation.

I’m planning to my summer vacation. I’m planning my summer vacation.

I’m planning to my summer vacation. I’m planning my summer vacation.

No need for the word "to" in the sentence

I’m planning to my summer vacation. I’m planning my summer vacation.

I’m planning tofor my summer vacation. I’m planning for my summer vacation.

My girl friend and I will visit to Hokkaido, where we haven’t go been yet! My girlfriend and I will visit Hokkaido, where we haven’t been yet!

My girl friend and I will visit to Hokkaido, where we haven’t go never been! My girlfriend and I will visit Hokkaido, where we have never been!

My girl friend and I will visit to Hokkaido where we haven’t gobeen before ! My girlfriend and I will visit Hokkaido where we haven’t been before !

No need for "to". You could also say "where we haven't visited before"

My girl friend and I will visit to Hokkaido where we haven’t go ne before! My girlfriend and I will visit Hokkaido where we haven’t gone before!

My girl friend and I will visit to Hokkaido, where we haven’t go ne yet! My girlfriend and I will visit Hokkaido, where we haven’t gone yet!

I have wanted to go to Hokkaido for a long time. I have wanted to go to Hokkaido for a long time.

Since you're talking about something which started in the past and is continuing into the present, you should use "I have wanted" instead of "I want".

I have wanted to go to Hokkaido for a long time. I have wanted to go to Hokkaido for a long time.

I've wanted to go to Hokkaido for a long time. I've wanted to go to Hokkaido for a long time.

I have wanted to go Hokkaido for a long time. I have wanted to go Hokkaido for a long time.

I have wanted to go to Hokkaido for a long time. I have wanted to go to Hokkaido for a long time.

It’This is because there are some historical facilityies, delicious seafood and great views. This is because there are some historical facilities, delicious seafood and great views.

(1) "This is" sounds much more natural than "it is". (2) "Some" means that you're talking about more than one of each of these things, so they should all be pluralised. (3) "Historical facilities" is not wrong but does sound a bit weird. Maybe "historical buildings" or "historical sights" might fit better.

It’s because there are some historical facilitysites, delicious seafood and great views. It’s because there are some historical sites, delicious seafood and great views.

A facility is a bit of a technical term, it's a place that serves a specific purpose, in a dry/factual sort of context. E.g., restroom facilities. Sites is a general catch-all that can mean almost any place of interest, and is often used in the context of traveling.

It’s because there are some historical facility,buildings, they have delicious seafood and the view is great view. because there are some historical buildings, they have delicious seafood and the view is great.

You could have continued the previous sentence and just linked it with because, telling us why you've wanted to visit Hokkaido

It’s because there are somof the historical fbacilitykground, delicious seafood and great view. It’s because of the historical background, delicious seafood and great view.

It’s because there are some historical facilitylocations, delicious seafood and great views. It’s because there are some historical locations, delicious seafood and great views.

Also, to go from Tokyo to Hokkaido, if we take a plane, it’s almost one and half hour s! Also, to go from Tokyo to Hokkaido, if we take a plane, it’s almost one and half hours!

Or you could just say "to go from Tokyo to Hokkaido by plane..."

Also, from Tokyo to Hokkaido, if we take a plane, it’s almost one and a half hour ! Also, from Tokyo to Hokkaido, if we take a plane, it’s almost one and a half hour!

Also, from Tokyo to Hokkaido, if we take plane, it’s almost onebout an hour and half hour ! Also, from Tokyo to Hokkaido, if we take plane, it’s about an hour and half !

Or you could say " from Tokyo to Hokkaido is about 90 minutes if we go by plane"

Also, it's almost an hour and a half from Tokyo to Hokkaido, if we takego by plane, it’s almost one and half hour ! Also, it's almost an hour and a half from Tokyo to Hokkaido if we go by plane!

Also, if we take a plane from Tokyo to Hokkaido, if we take plane, it’s almost onean hour and a half hour ! Also, if we take a plane from Tokyo to Hokkaido, it’s almost an hour and a half!

It’s so closely!! It’s so close!!

It’s so closely!! It’s so close!

For exclamation marks, only one can be considered as correct grammatically. Using more than one is okay (and common) in text or chat, but it isn't "correct."

It’s so closely!! It’s so close!

It’s so closely!! It’s so close!!

It’s so closely!! It’s so close!!

My Summer Plans My Summer Plans

Or you can say "My planned trip for this summer"