A spokesman in the sales department at Schwan said their Fraziers Bottom location didn't have expansion plans.
A spokeswoman from Nippon Thermostat wouldn't say whether or not the company plans to expand.
"We haven't decided anything yet," she said.
Nippon Thermostat bought land in Fraziers Bottom, its first manufacturing site in the United States, in 2003. It has a 26,000 square foot manufacturing facility and a 5,000 square foot office management facility, according to the company's website.
"[Nippon Thermostat] also owns additional land around the plant for future expansion," the company's website states.
Based in Tokyo, the company, manufactures parts for Toyota, Honda, Nissan, Mazda, Suzuki, General Motors, and Mitsubishi, among others.
In March, when Toyota announced its most recent expansion, Walton told the Gazette other companies in the county would benefit.
He said at the time that while Diamond Electric and Nippon Thermostat, both Japanese owned companies in Putnam, might not directly benefit in an increase in transmission production at Toyota, because they create other parts for cars, "it means there are more automobiles being produced and that does in fact create a trickle down effect resulting in additional business, hopefully, for those other companies as well."