Yasuyuki Konno had come close to opening the scoring for the home team after some neat interplay - a feature of Gamba's game, as always, of course, but it was Ramirez who found the net with his 25 yard effort as Shu Kurata slipped as he was about to make the blocking tackle. 1-0 at the break but plenty of encouraging signs for Gamba.
Konno took up where he had left off before the break and was soon in on the action again, heading firmly down, but just wide as Gamba looked for the equaliser. But it was not to be Gamba's night, this being epitomised by Genta Miura's last-gasp header going just wide when it seemed easier to score.
With the other game in the group finishing a draw, qualification to the knockout stages of the ACL is still within reach, but no more mistakes will be tolerated by the faithful fans.
Team - Suzuki, Miura, Fabio, Kim, Hatsuse (Doan, 61), Fujigaya, Endo, Konno (Izumisawa, 76), Kurata (Oh, 88), Ademilson, Nagasawa