Hi Kyoto,
Don't worry. There is no issue at the moment, but history dilemma looks like one of issues for SK, based on my objective observation, and may affect Japan.
Surely it stems from the war days.
My wife is not fond of South Korean people as she shared accommodation with two in Australia many years ago.
Personally, I never had an issue.
A little story:
Do you know a place in Sydney named Bondi Beach?
Well, my GF, now wife shared an apartment with a Korean student boy many years ago. The other share mate, now good friend was also Japanese.
They had huge issues, mainly because this Korean boy would take over the entire apartment wih his friends to all hours of the morning, and my wife and Japanese friend could not sleep.
To make matters worse, whenever I slept over the Korean boy used to dissaprove due to the extra water usage when I had a shower..
One day, my wife had cooked something in the kitchen.
She emptied the saucepan, and put the empty saucepan back on the stove, but had forgot to turn the heat off.
Suddenly, the suacepan started to smoke, my wife turned and picked it up and turned the stove off. When she moved it away to go in the sink, the meatll from the suacepan had melted, and drops dripped over the lino floor, possibly around 50 small drips.
The melted metal burnt holes allover the vinyl.
By this time, the heat was on with my wife and our now Japanese friend, against the Korean boy and his Korean buddies, male and female.
The Korean boy had called his so called "cousin", possibly just a term for good friend, who was a permanant resident in Australia, so I guess he though he was quite powerful.
He became violent with my wife and our Japanese female friend, who by the way, is now home in Chiba, and in turn, I stepped in to break the argument up.
This Japanese cousin, had a swing at me, I dodged, he missed, I then slapped him very hard on the cheek and he fell to the ground.
Sometime after this, the Koreans determined through the real estate that my wife had to pay for the damage on the floor.
Morally, she should have and I agree, but legally, it was the Korean boys lease, so he was fully responsible for etting that damaged repaired.
Anyway, late one night when they were even with the rent, I parked downstairs, and my wife and our Japanese friend quielty moved out.
We then all disaapeared late into the night to find a new abode..
I was of course living at my parents house at this time..
My wife also once shared with a Korean girl in Sydney at a different apartment and they never got on..
Apart from that, I have always been involved with japanese and Korean students in Cairns, and they always appear to have a love hate relatiosnhip, although most of the time it appears to be from ignorance more than anything with a touch of jealosuy from the Korean side.. Japan VS Korea, etc.
I think the main problem here, and like I said, I am not really sure, is that Korea feels that Japan never apologized for possible war time attrocities. but then again, North Korea, Burma, Thailand, China, Australia, NZ and a few other's I believe all feel the same, although it seems to carry on with affect a lot more in Asian countries for some reason..