Those numbers are the date, the Japanese have a different counter for years to us which is why it doesn't resemble a date really!! I think its 11 July but I could be wrong.
My b/f bought his 32 GTR with 56,000 on the clock but there was a sticker on the battery saying it had been replaced at 99,000kms. Its inevitable, they've all been wound back!!
My odometer stopped at 59,999kms a few months ago. My b/f pulled it out, fiddled around with it and its worked ever since...no idea!!