The train service between Hiroshima and Osaka is primarily served by the Shinkansen, specifically the Nozomi and Mizuho services. The fastest option, the Nozomi Shinkansen, can reach speeds of up to 300 km/h (186 mph) and completes the journey in approximately 1 hour and 25 minutes, with minimal stops at some key stations. On the other hand, the Mizuho service takes about 1 hour and 35 minutes, making a few more stops along the route such as Okayama and Himeji, providing access to additional cities in the region.
Both services are equipped with comfortable seating options, including Ordinary and Green class. The Green class offers enhanced legroom and additional amenities for a premium travel experience. Overall, the Nozomi is best suited for those prioritizing speed, while the Mizuho offers a balance of efficiency and regional accessibility.