For travelers going from Yokohama to Aioi, the primary choice is the Shinkansen service, specifically the Sanyo Shinkansen line. The fastest option available is the Nozomi train, which operates on this route and can reach speeds of up to 300 km/h (186 mph), completing the journey in approximately 1 hour and 45 minutes. The Nozomi service has few stops along the way, making it the quickest method of travel between these two cities. Another alternative is the Hikari Shinkansen, which also covers the same route but takes about 2 hours and 10 minutes due to additional stops at major stations like Kobe and Himeji. This service strikes a balance between speed and regional access, making it a suitable option for those wishing to explore more areas along the route. Both the Nozomi and Hikari trains offer comfortable seating in Ordinary and Green class, ensuring a pleasant travel experience with onboard amenities such as Wi-Fi and refreshments. The choice between these services would depend on travel priorities, with the Nozomi being favored for pure speed and the Hikari for broader access to key destinations.