Tokyo is 13-14 hours ahead of Indianapolis. Indianapolis uses Eastern Time (EST/EDT) while Tokyo uses Japan Standard Time (JST, UTC+9). When it's 9:00 AM in Indianapolis, it's 10:00 PM (EST) or 11:00 PM (EDT) the same day in Tokyo.
Japan does not observe daylight saving time, but the US does. The difference is 13 hours during US daylight saving time (March-November) and 14 hours during standard time.
Best calling time: 6:00 PM - 2:00 AM Indianapolis time. This corresponds to 8:00 AM - 4:00 PM (EST) or 7:00 AM - 3:00 PM (EDT) in Tokyo, covering Japanese business hours.
Indianapolis has connections to Japan through automotive industry ties, as several Japanese automakers have major operations in Indiana. The city's motorsports heritage also attracts Japanese racing enthusiasts.