Damn, Tsunku is even more awesome than I thought.
Just think: music is his life, and whether he sings for a living or just producing it, his voice is an important aspect of that, and of life in general.
But despite all that, he is able to get back on his feet and strive to produce more music, while also trying to adjust to this new lifestyle. It just goes to show that when you love something, you dont give up, and when you dont give up, you can get past an obstacle and work your way around it. It's definitely easier said than done, and Tsunku was, imo, quick to get back on his feet, despite all the possible permanent trauma/psychological effects that could've stunted his spirit.
In anycase, he seems to be cured and happy, and that's wonderful news. It's even greater to know he wont stop producing, even if its not all him now, which is not a bad thing at all.