@aho ooof that jacket looks good!
It looks like the pattern is the same as the Railroad jacket which I have in ecru. I remember discussing the fit with @Broark and @JohnM at the time.. as @Broark says the shoulders are noticeably slimmer. @JohnM had contacted Ryo directly about the pattern and Ryo said the following... I'm working on the basis John's ok with me sharing as it's some useful info direct from the maker himself 👍
"As you feel, this jacket has a unique fit because of vintage cutting A line, Narrow shoulders and wide arm, side seamless, split sleeves. A split sleeve is a set-in sleeve at the front and a raglan sleeve at the back. You may be feeling something wrong with your shoulder fit until you get used to this jacket, it is right, it is an intentional element. In our opinion, your shoulder fitting should be more comfortable little by little as you wear it. Enjoy!! "