However, I would like to tell you more about Japanese philosophy on different things, but I only just started reading a book that might explain why Japanese people are the way they are and what has contributed to the development of their culture. I'll update you when I finish the book.

I don't quite understand this sentence, as the two halves don't fit together clearly. This is what I think you mean, that you were planning to share more on Japanese philosophy, but realised you need to finish the book? I said "has contributed" as it supports the idea of their development being on-going.

If any Japanese people are reading mey posts, or someone close to themknowledgeable about Japanese culture, please share the books I should read to understand why they do everything so pretty, andartistically - even when they make tea it's like watching a ballet with their hands.

"reading me" sounds odd - either "following me" or "reading my posts".

"pretty" should be "prettily", but a better fit is "artistically" or "beautifully", or even "deliberately".

But let's get backturn to the second thing that makes me excited — the whole month's-long trip to Georgia's mountains for snowboarding till I pass ofut from exhaustion.

"get back" would make sense if you had mentioned the snowboarding at the beginning of the post then moved on. As you're talking about it for the first time here: "turn".

I would say "that excites me", but what you've written is correct.

"whole month's trip" sounds strange.

"pass from exhaustion" suggests dying, I assumed you meant "pass out"? Or "collapse from exhaustion".

I have been to the mountains a few times, but only for a week or two, and never for souch a long period.

you could say "never for so long a period", but this is pretty poetic sounding.

Especially for this trip, I updated my helmet and glasses especially for this trip, because theon my last time I'd been riding for so long my mussels on the rip I realised I needed the upgrade. I had been snowboarding for so long that my leg musclegs stopped listening to me.

It sounds better if "especially for this trip" comes later.

I wasn't sure how this sentence fitted with the next couple, so I added a bit to make it clearer.

I'm not a snowboarder, so I don't know what vocab they use. "riding" sounds odd to me.

"mussels" are a type of shellfish.

"muscles on the legs" = "leg muscles", e.g. arm muscles, back muscles.

I've been was going down feelingthe mountain when I noticed how my knees started shaking. I had just get thoughtdecided that I haveneeded to stop and get rest for a bit or I'll would catch the kant, and just thethe very next second I'm was falling face downwards, hitting my head and my, with the tip of themy nose unpleasantly touching the snow.

I think this makes what you mean clearer.

"get rest for a bit" sounds odd, you could say "get some rest for a bit".

I didn't recognise the phrase "catch some kant", I googled it and you might mean "catch an edge"?

"my tip of the nose" sounds wrong. You'd also say "the tip of my tongue", "the ends of my hair", I guess this is just a rule.

The tenses are a bit tricky here, I think what I've written is right.

I'm was beating my lungs down and caouldn't catch my breath for the next few seconds.

I don't know what "beating my lungs down" means. "I was winded and couldn't..." "I had the air knocked out of my lungs and couldn't..." One of those?

Luckily I didn't break anything a. After that I went the rest of the way down like a newbie, carefully with shaking legs, and hadI rested the next day.

I wasn't clear if you went back up again after your fall, my correction is assuming you didn't. If you did, I'd say "After that I skateboarded like a newbie, carefully...".