It's a quite a popular annual event in Hokkaido. It's quite a popular annual event in Hokkaido.

It's a quiterelatively popular annual event in Hokkaido. It's a relatively popular annual event in Hokkaido.

"a quite popular" sounds weird but it's hard to explain why.

It's a quite a popular annual event in Hokkaido. It's quite a popular annual event in Hokkaido.

This year, it's been holdrunning for ten days and is still it's going on. This year, it's been running for ten days and is still going on.

something like that haha

This year, it' has been holdingon for ten days and still it's going on. This year, it has been on for ten days and still it's going on.

This year, it's been holding for ten days and still it's going on's festival has been going on for ten days already. This year's festival has been going on for ten days already.

This year, it's been holding for ten days and is still it's going on. This year, it's holding for ten days and is still on.

This year, it's been hoelding for ten days andso far and is still it's going on. This year, it's been held for ten days so far and is still going on.

Maybe, it's going toThough, maybe, it will end tomorrow. Though, maybe, it will end tomorrow.

The maybe feels weird as a conjunction here.

Maybe,I believe it's going to end tomorrow. I believe it's going to end tomorrow.

Maybe, it's going toIt might end tomorrow. It might end tomorrow.

I went to the festival for the first timeThis was my first time going to the festival. This was my first time going to the festival.

I'm going to completely rewrite this because the statement you made is good grammar but not what you're trying to say. The emphasis is on the first time.

I thought it would be very cold in Hokkaido before I visited, so I prepared snow boots, a scarf and a beanie. I thought it would be very cold in Hokkaido before I visited, so I prepared snow boots, a scarf and a beanie.

I thoughknew it would be very cold in Hokkaido before I visited, so I prepared snow boots, a scarf, and beanie. I knew it would be very cold in Hokkaido, so I prepared snow boots, a scarf, and beanie.

This sounds like you're going to say のに of だが when you start as sentence with "I thought" it has the impression it's going to be like かと思うったら but it really was cold. Since it's past tense you don't need to say "before I visited".

I thought it would be very cold in Hokkaido before I visited, so I prepared snow boots, a scarf and a beanie. I thought it would be very cold in Hokkaido before I visited, so I prepared snow boots, a scarf and a beanie.

I went to the snow festival in Hokkaido and came back home last night. I went to the snow festival in Hokkaido and came back home last night.

I went tocame back home from the snow festival in Hokkaido and cam back home last night. I came back home from the snow festival in Hokkaido last night.

This is a little more natural because you didn't tell us you'd gone.

I went to the snow festival in Hokkaido and came back home last night. I went to the snow festival in Hokkaido and came back home last night.

I went to the snow festival in Hokkaido and came back home last night. I went to the snow festival in Hokkaido and came back home last night.

The temperature was around minus 1 degree Celsius during the day, and minus 10 degrees Celsius at night when I was there. The temperature was around minus 1 degree Celsius during the day, and minus 10 degrees Celsius at night when I was there.

I think the way you wrote it is correct but I tend to say negative 1 or negative 10 degrees.

The temperature was around minus 1 degree Celsius during the day, and minus 10 degrees Celsius-1C during the day, and -10C at night when I was there. The temperature was around -1C during the day, and -10C at night when I was there.

The reading of this is the same as you typed it but we type it a little differently.

The temperature was arboundt minus 1 degree Celsius during the day, and minus 10 degrees Celsius at night when I was there. The temperature was about minus 1 degree Celsius during the day, and minus 10 degrees Celsius at night when I was there.

The sSapporo Snow fFestival in Hokkaido The Sapporo Snow Festival

You can usually check proper nouns on Wikipedia in English! https://en.wikipedia.org/wiki/Sapporo_Snow_Festival