Help with Japanese dates

I have some Japanese coins that I need help with the dates on. Hopefully one of you excellent ladies and gentlemen can help me out. The first three are 1 sen coins.

 

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Here is a half sen and two more 1 sen.

 

This one I don't know if it's Japanese or another country, so I need more info on it.

 

Krause says the these are Y# 42. 3.75g bronze 23mm The first is YR12 (1923) mintage 155,500,000 and the second and third are YR11(1922) mintage 253,210,000

 

On the first one, the Y# is the same as above but is YR10 (1921). The 1/2 sen and the other 1 sen bear the marks of emporer Mutsuhito (1867-1912)and are YR 17 (1884) and YR 10 (1877) respectively. My book is for 1901-2000, so I have no other info on them. A member who may know for sure is hontonai. I'm just getting a small grasp of it myself and hope he will verify my statements here.

 

thanks for all your help. I have the 1901-2000 Krause book. Is reading these dates something I can learn fairly easily? I figured out the Arabic dates using the table at the beginning.

 

This one IS Japanese... Y#72 3.75g, Brass, 22mm. It is YR26 (1951) :bow: thank you and goodnight!

 

Lol, this is the very same way I'm learning myself. Some systems come easier than others.... Now I know who to look for with my Arabic date ?'s !!!

 

Thanks for your help. I think the Arabic dates are easier than the Asian dates, but the biggest problem is the 2 and the 3 in Arabic are very similar and can be hard to tell apart, especially if the coin is worn.

 

http://www.lioncoins.com/nippon.htm
@Hiddendragon try this web sight to help with the Japanese dating. It helped me.
Derek

 

Thanks, I'll bookmark it.

 

Looks like everything was ID'd properly before I got here.

ForTHEkids' link is to the site I consider the absolute best and most complete source of dating information on Japanese coinage.