Damn... I'm salty, I wanted to see his debut but didn't really believe he was going to play so early so I ended up forgetting the played today. Trying to find the match on the net...
http://www.sponichi.co.jp/soccer/news/2014/02/09/kiji/K20140209007555840.html Nagasawa saying he didn't feel the pressure today, hoping to be able to mix with teammates and contribute more and more.
Bild interview with Nagasawa http://www.bild.de/sport/fussball/fc-koeln/hier-tricksen-die-neuzugaenge-34739280.bild.html
I checked a Koln fan forum and judging from their comments I don't think Nagasawa's performance is as strong as his past games for the club. One member said he was fortunate not to get a red. They're currently leading 2-0, Anthony Ujah with the second so looks like the victory is secured in any case.
Didn't watch, but he seems to have initiated the play which led to the 1st goal and recorded some shots. I don't think there's much more to ask from a guy who is relatively new to pro football, also kept in mind nobody at Köln had any expectation about him whatsoever breaking into the first team. And... I read a comment that Nagasawa and Halfar bring back memories of Littbarski and Hässler
he did well but not as good as in the other matches. This was a hard match anyway. Well... he isn't as dribbling-oriented as Kagawa, but shares a great vision