Soujirou Seta

Guess that's how would you imagine a samurai in those situations, where wearing armour isn't necessary.

Well done !

Thank you!
In the Rurouni Kenshin anime the samurai are portrayed in normal armor-free clothing, but I believe the samurai who lived in the Tokugawa era were wearing armor.
The anime takes place at the beginning of the Meiji era, where the samurai were forbidden to wield their swords, I believe that was the reason for the lack of armor in the dress of the characters.

Actually the Japanese started wearing armors before the samurai class was developed, in 4th Century AD (when Ancient Rome was declining) - according to https://books.google.pl/books?id=dCNioYQ1HfsC&pg=PA75&dq=japanese+cuirass&hl=en&ei=HGX3TcmwMtO_tgfrsPHgCg&sa=X&oi=book_result&ct=result&redir_esc=y#v=onepage&q=japanese%20cuirass&f=true , around 300 AD they already used helmets and cuirasses as means of personal protection. It looked like this https://en.wikipedia.org/wiki/File:KofunCuirass.jpg

Wow, the samurai armor is really old!

nice

Thank you!