Ritchie will lobby for the championship to be cut from seven to six weeks from 2020, removing one fallow week from the schedule.
In the recent competition there were weeks off after the second and third rounds and Ritchie wants to chop one of these, despite players such as England prop Joe Marler saying they are at breaking point already and need the built-in recovery periods.
Ritchie said: “We believe it is perfectly right to have a six-week competition as opposed to a seven-week one. It would improve it.
“It would narrow the off periods, help with the broader narrative and we think it is a good route. It may well be that others agree or disagree.”
The Six Nations schedule could be cut from seven weeks to six
Rugby's controversial moments
Fri, September 18, 2015
From 'Bloodgate' to suspensions here are Rugby's most controversial moments.
1 of 14
Harlequins' Tom Williams faked blood pouring from his mouth with blood capsuls in a scandal now referred to as 'Bloodgate', 2009
England celebrate winning the Six Nations
Get Quotes on Home Insurance
Ritchie has had discussions with England head coach Eddie Jones but is not going to canvass the views of the players.
And he revealed the RFU had to concede defeat in their attempt to get a summer off built into the international schedule when a new global calendar was blue-printed last week in San Francisco.
England had wanted to scrap tours the summer after a World Cup but that was knocked back as southern hemisphere unions rely on the cash generated for survival.
He added: “The general view is that it’s alright for us to suggest a fallow year, but a fallow year means we are not playing somebody – whereas the key, important economic factor for all the tier one nations is, how many matches do we have and what revenue can we get from them.”