Senegal's Sadio Mane, center, scores his side's opening goal past Japan goalkeeper Eiji Kawashima, right, during the group H match between Japan and Senegal at the 2018 soccer World Cup at the Yekaterinburg Arena in Yekaterinburg, Russia, on Sunday, June 24, 2018.
But Japan didn't waste time to get back into it, scoring 20 minutes later off a fine finish from Takashi Inui.
With this draw, Japan and Senegal both sit atop Group H with four points.
Though he did not elaborate on the lapses, the comment was particularly true of the Keisuke Honda tap-in that made it 2-2, after full-back Moussa Wague had put Senegal ahead for the second time.
Sadio Mane and Moussa Wague had given Senegal hope of a second successive victory in Russian Federation but efforts from Takashi Inui and Keisuke Honda earned Japan a deserved share of the spoils.
Sadio Mane put Senegal ahead from close range after an very bad mistake by Eiji Kawashima, the ball flying past the Japan keeper after his attempted punched clearance hit the Liverpool forward. And in this game they came from behind twice to draw with a Senegal XI more seasoned and high-profile and, crucially, who have had the same coach for three years.
Senegal's back line might have faltered towards the end but they began strongly and their robust defending neutralised any early threat that the Japanese front line posed, allowing their own attackers to push up in numbers.
It took just 11 minutes for Japan to find themselves behind and it was Haraguchi and Kawashima who were at fault.
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Despite what went before, they won their first game, admittedly against a Colombia team without James Rodriguez and which played with 10 men for much of the match.
A minute later, Japan coach Akira Nishino sent on Honda and striker Shinji Okazaki, a move that paid off.
"I evaluate it as a good point", concluded Nishino.
"I'm sure he's regretting that decision after conceding that goal".
Osako possesses a quiet confidence, according to another Germany-based player, attacking midfielder Takashi Usami. "Senegal is a very tough team and this result, I hope, will lead to success in the next match".
"I don't think it [the delivery] was anything hard but he made that decision which is regrettable", he said.
Senegal set as +129 favourite in this match-up.