Need help deciphering this Ariska rifle.

[Comanche]

I scored this is a trade for some work.
I looked up the markings online and it appears to have markings of a model 38 rifle but the stock definitely looks like a sporterized aftermarket or more modern than the Ariska stocks I’ve seen online.
It also appears that someone drilled through the flower marking and the model number (in Japanese), possibly for scope mounts.
The action is smooth and it seems well built but I would just like some more info of anyone cares to ponder on this.
The barrel is rifled so it’s not a blank shooting training rifle.
Here are some pics.

 

[BLIP]

Arsenal something. I grew up in Japan but I don't recognize that Kanji

 

[BLIP]

If you're speaking about the chrysanthemum that is the symbol for Japan's Divine emperor

 

[Comanche]

Yeah I couldn’t think of the name of that chrysanthemum...I can barely pronounce it...lol.
Shiki?

 

[GFB]

I looked up the markings online and it appears to have markings of a model 38 rifle

https://oldmilitarymarkings.com/japanese_markings.html

This link has got a breakdown of how to read the markings. Should be useful.

 

[Comanche]

https://oldmilitarymarkings.com/japanese_markings.html

This link has got a breakdown of how to read the markings. Should be useful.

Yeah I’ve been checking it out.

 

[Comanche]

Think I got it figured out.