Ryukksakku! So backpack in Japanese is rucksack? 😲
Every time I encounter a word in foreign language that is similar to the one in Russian, I feel weird — even if for both languages it's a loanword 😄
@charlie_root
In English — yes, there are grades of backpacks and rucksack is a more rugged one, but in Russian and Japanese it's rucksack all the time, no finer grades.
In Russian there are other words you could use — but those aren't common, mostly come from different fields' professional slang, not sure about Japanese.
It's a rucksack just a tougher backpack for outdoors activities and hiking?