J-League newcomers Yokohama FC have edged local rivals Yokohama F. Marinos 1-0 as Tomonobu Hayakawa's early effort proved the differnce in the first city derby in nine years.
Yokohama FC began the game in a positive fashion as Japan striker Kazu Miura's long-range effort was beaten away by Marinos goalkeeper Tetsuya Enomoto before Hayakawa opened the scoring after just eight minutes as he headed home Norio Omura lobbed cross.
Marinos defender Hayuma Tanaka came close to an equaliser early in the second half but Yokohama FC goalkeeper Takanori Sugano made a fantastic reaction save as the home side held on despite late pressure from the visitors.
"It's important to have a strong mentality to play this kind of game," said Yokohama FC boss Takuya Takagi. "Knowing the significance of this game, they played their role as an individual and a unit. That led us to this outcome."
Marinos coach Hiroshi Hayano added: "When you have so many opponents in front of the goal, you can't do much about it. We didn't have luck, either."
Shimizu S-Pusle scored three goals in just four first-half minutes to maintain their 100 percent start to the season with a 3-1 away win over JEF United Chiba.
Korea Republic international Cho Jae Jin struck the opener after 17 minutes before midfielder Takuma Edamura found the net three minutes later and former Japan international Teruyoshi headed home a minute later to complete the blitz.
Chiba grabbed a consolation with six minutes remaining as Ilian Stojanov converted from the spot before Shimizu substitute striker Akinori Nishizawa was dismissed two minutes later.
Kazuyuki Toda struck in the 88th minute to rescue a 1-1 draw for Sanfrecce Hiroshima against Kashiwa Reysol after Miroru Suganuma had opened the scoring seven minutes before the break.
Nagoya Grampus Eight eased to a 2-0 victory against Ventforet Kofu courtesy of strikes from Kim Jung Woo and Keiji Tamada, while Fabricio's 83rd-minute winner handed Jubilo Iwata a 2-1 victory over Oita Trinita.
in the day's other game, FC Tokyo won 2-0 at Omiya Ardija.