I thought :
JP = JAPAN
SP = SIngapore
IP = International Pacific
IMHO, JP and SP coded racket is different.
Paint quality wise : JP paint quality is superior than SP
Feel : JP racket feels more solid. erm.. i think it is stiffer.
I have said what it means above ^
Kwun I understand that it is SP because of Sunrise
ALL!! my badminton racket (At the moment) are from Singapore or Asia and they all have on the side the Sunrise holographic logo on the Control Cap