Confusing Japanese coin

I was looking at this coin on numista and it doesn’t show a smooth edged version or a outlines 10 version on there anywhere. What is this?

UPDATE: I have another one WITH the reeded edge for comparison but it also has the 10 outlined instead of solid like the others

 

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Here is the one with the reeded edge

 

Wikipedia says (10 Yen)
"10-yen coins issued between 1951 and 1958 have reeded edges, while 10-yen coins issued from 1959 onward do not." I think this one is 1984

 

Can't see the date on that one.

 

http://portlandcoins.blogspot.com/2012/11/reading-japanese-numbers-and-dates.html

 

Thank you very helpful resources.

 

Here's a reeded and plain edge side by side for comparison.
(mine) Left: Showa 56 (1981), smooth. Right: Showa 27 (1952), reeded.
It looks like yours are Showa 59 (1984) and Showa 29 (1954).

 

The coin posted as a reeded edge looks like Showa29 (昭和二十九年) or 1954, so that one should have a reeded edge. As already mentioned, the other one dates Showa 59 (昭和五十九年) or 1984 so it should have a smooth edge. The smooth or plain edges for the 10 Yen began in 1959. Everything dated before that will have a reeded or milled edge.

 

I was on a job in Japan in the 1980's and noticed this in some vending machine change. I asked a few of the locals about it, but no one cared...

 

I still haven’t had the chance to make it out of my country but hopefully someday! I can’t wait to collect coins in another country for the first time.

 

I haven't been many times, but working on a job in Japan, I went into a department store and found the coins department and bought a coin.