Nippen Denso Plugs stock in GENII's??

I was surprised after changing out the spark plugs today after 13K miles to find Nippon Denso plugs from the factory. I would have lost that bet thinking they were NGK's
 
My 08 had Denso stock as well. I went back with the NGK's. The service manual list the Denso plug.
 
I would have bet the stock plugs would have been NGK iridium plugs. That is what I will put in when I service the bike in the spring.
 
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