MCC Chief Executive & Secretary Derek Brewer has highlighted the importance of the Nursery Ground to Lord's, after more than 1,000 spectators attended the Club's match against Japan.
Brewer spoke about the second Ground at Lord's - which is used to host non first-class matches and as an international standard practice facility - during the fixture, which celebrated 150 years of cricket in Japan.
He told Lord's TV: "It's absolutely crucial we maintain the size of the Nursery Ground so we can host matches of the size and importance of this in the future."
The Nursery Ground hosts around 46 days of cricket a year, and is in near continuous use from March to October.
In addition to being used as a practice facility for professional teams including Middlesex, England and touring international sides, the Nursery Ground is home to the Cross Arrows team, comprised of MCC staff and Members, which plays a number of games at the end of the season.
Part of the Ground is also used a a picnic area during major matches on the main Lord's Ground.
Protecting the size of the Nursery Ground was a crucial element of the Club's new Masterplan, which includes a partial relocation of the Ground towards the Club's freehold land adjacent to Wellington Road.
Watch: Japan celebrates 150th birthday at Lord's