I've known a few very hung Asian guys. I've lived and worked in Thailand, Malaysia, Indonesia for 22 years. Met really hung guys in all these places.
Thailand seems to be the best. My first huge Asian dick was a go-go boy at Boys, Boys, Boys in Pattaya. He was really cute and tall, I'd say a good thick 9 inches. There was a well known artist in Bangkok I met. Really muscled, handsome, and I thought I'd not have a chance with him. Met him at an after-party from DJ Station. Other guys around him like bees at a pot of honey. He surprised the hell out of me when I said I was going back to my rooms and goodnight to the guys and he and a friend followed me out the party, and joined me in my taxi. His friend, also a muscled cutie, got out the taxi close to his place and the artist guy invited himself to my place for the night. We showered, separately and got into bed. After some upper body wrestling, I managed to get a feel of the dick I felt jabbing into me and my god he was huge. 10 thick inches. He was a marvellous lover too and I fell for him badly. Lovely guy, with the bonus of a huge dick. We had a couple of threesomes. Just loved it once when he forced a Dutch guy to be fucked. Got a great close up of that huge dick raping that hole as he pushed the guy down onto the floor to fuck him. Sadly I lost touch with the guy, but occasionally met up with him but without sex. He had a studio in Soi 4 Silom in Bangkok. Right next to the Telephone bar. Sadly I heard that he died 3 years back, from heart failure. I think many foreigners knew him and enjoyed him.
I was coming to the end of my contract in Jakarta and met a good looking guy at the bar in the Hyatt, which at the time was a well known gay cruising site. I was asked if I'd like to go to the Tanamur with him. I'd heard of it but never been. It was said to be the most crowded nightclub on the most crowded island in the world and everything was their. Since closed down. Walking with the guy towards the bar, I was groped by nearly everyone there, male, female and those in between and maybe both. I ordered drinks for us both and within a couple of minutes, the guy had taken my hand and placed it on his crutch. It felt fucking massive. Drinks were soon forgotten as we pushed our way through the dancing throng back to my place and we basically instantly stripped each other. He was really massive and he wanted me to fuck him like crazy. We had some great sex before I left Jakarta, he also introduced me to some of his sexy pals too some of which were also hung but not as big as him.
I've met and had fun with Cambodians, Vietnamese, Lao, Malaysians and Singaporeans who have been very hung too. For 17 years, I've had a Thai lover/partner who is also very well endowed and also likes to play with Chinese and Japanese guys with me and also understands that I like my hung guys too.
Asian guys are unfortunately stereotyped as being camp, skinny and having "needle" dicks. Not totally true. I have surprised many of my "falang" friends over the years by introducing them to my hung Asian friends.