In the past, girls and boys have both been allowed to get in the ring and grapple with the sport's famously hefty stars at the outreach events.
But an official told AFP that the Japan Sumo Association last week requested girls be barred from participating in a programme for children in Shizuoka prefecture, part of an event designed to showcase the sport to local fans.
The event was held Sunday.
"It is out of safety concerns," a spokeswoman for sumo's governing body told AFP, speaking on condition of anonymity.
She said the safety of boys was just as important, but that the association felt there was a "difference" between the effect that possible scars and injuries could have on girls, compared to boys.
"You must understand the nuances," she said.
"This was not an abrupt decision. For a long time, we have received reports of injuries to children." The request to exclude girls will be made at showcase events in other regions, she added.
The rings where sumo is practised, known as the dohyo, are seen as sacred places in the native Shinto faith.
Women, who are considered to be ritually unclean, are barred from stepping into them.
But multiple announcements were made over loudspeakers asking the women to leave the ring.
"I'm a female mayor but I am a human being," she said in a speech delivered from a podium outside the ring.
"But because I am a woman, despite being a mayor, I cannot make a speech in the ring." The association's decision to bar girls from the showcase events was widely slammed on social media.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)