5 tournament system in sumo

I've read a proposal to amend sumo wrestling to a five tournament system in a paper, section of letters column. I agree with this opinion.

Many of the sumo wrestlers are suffering from injuries, fighting on the sumo ring with the supporters on. There is not enough time for them to recover injuries.

In working society, shortening of working hours is demanded. Even in the sumo world, how about getting on this trend?