Yes.
The international presence at Carleton has been rising yearly (about 10% of last year's entering class). Students from Japan are on campus along with Japanese fluent Americans though unaware of how many. One profile:
Carleton College: Information for International Students: International Student Profiles: Making an Impact
Petra Crosby,
pcrosby@acs.carleton.edu, at the office of international student programs should be able to help with specific questions.
On a related note, CBS in Minneapolis this week covered a great story about Carleton's first Somali student on campus - it's well worth watching the broadcast piece:
wcco.com - Woman Makes History As 1st Somali Carleton Grad