Japan attacker Ritsu Doan scored his fifth goal of the German Bundesliga football season on Sunday, leading Freiburg to a 1-0 win away to bottom club Darmstadt. Doan, coming in from the right-hand side, exchanged passes with Michael Gregoritsch and fired in a curling shot 36 minutes into the match. “I’m finally starting to get the numbers,” the 25-year-old Doan said of his season goal tally — three of them coming in the last four league matches. “A good ball came to me. I was able to shoot with great concentration.” Among other Japanese playing for European clubs, Koki Ogawa scored both goals…