How old is too old?

I'm 35 years old. I'll be moving to Japan in the near future. Currently self-training myself to become a professional Kickboxer at 155lbs/70kg. Your honest opinion is greatly appreciated. Thank you.

35 is not too old to start, but you won't be able to compete against 22-27 year olds who have been doing it since their teen years.

i'd stop worrying about it and just do your best. personal skill and fitness is far more important than age at all but the very highest levels of sport. it seems all the best marathon runners are always over 30 and that's one of the hardest sports there is.

Your age is a legitimate concern. But more importantly, if you want to become a successful professional kick-boxer, you cannot be self-training yourself. I think you'd be much better off getting the skills and fitness in some Muay Thai training camp in Thailand.

Kinda upper limit here.
Most KBers are under 35, but there are exceptions.

But usually in these kind of fight sports, oldies (especially old newbies) are mostly treated as cannon fodder to boost young fighters' confidence.

Self-training to become a kick-boxer at 35, huh? That doesn't sound right.

Thank you all for your inputs. Been into martial arts since age 5 (starting with Taekwondo & Hapkido). Diversified myself in the arts (Kung Fu, Karate, Muay Thai/Kickboxing, Capoeira, Jeet Kune Do, Kali/Escrima, Ninjitsu). Was Martial Arts Tournament Lightweight (3rd Place), 2x Taekwondo Champion, and a former semi-pro Light Middleweight contender (International Kickboxing Federation:IKF). Had ups & downs in life. Can't help wanting to still try and pursue a fighting career, even at my current age. It's in my blood.

The reason(s) why I'm self-training is because it's difficult to find the right trainer/coach, and the people who can TRULY understand what I desire and help me on the path of becoming a successful contender in the sport. Ever since I saw the movies "Bloodsport" & "Kickboxer" w/ Jean Claude Van Damme (hope I spelled his name right), I wanted to become just like him; and I still do to this day. Been reading, training, keeping up with the world of Muay Thai & Kickboxing. I regularly read the following martial arts magazine(s): International Kickboxer (Austrailian-based), Muay Thimes (U.S-based), and Black Belt (U.S-based). I watch videos on YouTube, got a couple of self-training videos, learned from various teachers & instructors. My Muay Thai & Kickboxing background is based on teachings from Master Toddy & Ajarn Sirichai Sirisute. Overall, if anyone is wondering if I have training and experience? The answer is YES. Lastly, I've been into K-1 since it first started (since 1993). Imagine that, huh? I was age 16, living in the US while attending high school...

Believe it or not, I also participated in the 1st ever K-1 USA Open Fighter Tryouts back in August 2006 at the Belagio Hotel & Casino in Las Vegas. Was not in the best shape like I should've been, but tried out none-the-less. Met many great people: Rick "The Jet" Roufus, Akebono, Rony Sefo (Ray Sefo's brother), Carter Williams's coach & trainer, Gary "Big Daddy" Goodridge, (then president) Tanikawa, Kazuyoshi Iishi (the original founder & creator), Jan "The Giant" Nortje,,, the list goes on.

My apologies, but I stand correct. The 1st K-1 USA Open Fighter Tryouts was in 2004, not 2006.