They're enjoying the River Walk and other local attractions, but what really has captured the interest of dozens of executives of Japanese-based organizations is the Eagle Ford Shale in South Texas.
"As you may know, Japan is one of the largest importers of natural gas," said Takashi Nakamizo with the Japan External Trade Organization.
The group was scheduled to visit the Eagle Ford Shale Thursday.
"Many Japanese companies are looking for opportunities to import natural gas to Japan," Nakamizo told 550 KTSA News.
Bexar County Judge Nelson Wolff and other local officials are hosting the delegation of more than 30 Japanese executives.
"There's a tradition in the Japanese business culture called 'Go and See.' It's basically saying that if you have a problem, you're not going to figure it out sitting behind your desk. Get up and go check it out," said David Marquez.
The delegation toured the Toyota Tundra plant Wednesday as the one-millionth truck rolled off the assembly line.
"It's fantastic! We are proud that Toyota is providing so many employment opportunities for the community," said Nakamizo.
They also toured the San Antonio Water System and were scheduled to have dinner Wednesday evening at the Briscoe Western Art Museum.