For a channel usually focused on aircraft cabins, Japan’s Shinkansen offered a chance to review a different way of travelling.

Our journey took us from Tokyo to Shin-Osaka aboard Nozomi 323, travelling in Green Car, the train’s first-class accommodation. The appeal was straightforward: a fast connection between two major cities, with extra space to enjoy the journey.

Green Car is the premium seating option available on this service. Its most obvious difference is the layout: two seats on either side of the aisle, compared with the three-and-two arrangement in Ordinary Car. JR West’s published cabin information confirms these configurations.

That means no middle seat and fewer passengers across each row. Standard accommodation is already comfortable, so the upgrade is about gaining more personal space rather than escaping an uncomfortable basic product.

On our journey, the Green Car atmosphere was peaceful, making it an appealing place to settle down between destinations.

The generous recline was one of the strengths of the seat, alongside the practical details around it.

There was a built-in reading light, lighting controls in the armrest and power at each seat. The large pull-out table provided useful space, whether for food, a laptop or simply organising belongings.

These features matter on a journey where passengers may want to switch between watching the scenery, working and relaxing. Rather than relying on one headline feature, the seat offered a collection of useful touches.

Travellers expecting an airline-style first-class meal should adjust their expectations: food was not included with our Green Car ticket.

There was an ordering card at the seat, alongside onboard information and magazines, and refreshment towels were provided.

The distinction matters when judging the upgrade. Green Car’s value on this trip came principally from the seat, space and peaceful surroundings. It should not be priced against another premium travel product on the assumption that the same catering is included.

Connecting to the onboard Wi-Fi was straightforward using an email address. During our journey, download speeds were around 3 Mbps.

That was our experience on this particular service, rather than a guaranteed connection speed for future passengers.

We also found a luggage rack with a coded locking system at the rear of Coach 9. It was a useful feature for keeping bags away from the seating area.

Passengers travelling with large cases should check the current baggage rules before booking. JR Central says luggage measuring more than 160cm and up to 250cm in combined height, width and depth requires a seat reservation with an oversized baggage area on the Tokaido–Sanyo–Kyushu Shinkansen.

The toilets were an especially strong part of the onboard experience.

On our journey, they were exceptionally clean, with a Western-style toilet, a small sink and sensor-operated controls that reduced the need to touch surfaces.

It may sound like a minor detail, but the condition of shared facilities contributes directly to how comfortable a journey feels. A good seat loses some of its appeal if the rest of the train is poorly maintained.

JR Central advertises its fastest Tokyo–Shin-Osaka journeys at approximately two hours and 21 minutes. Individual services vary, so passengers should check their chosen departure rather than assume every train takes the minimum time.

A flight comparison needs to include the whole journey: reaching the airport, checking in, security, boarding and travelling onwards after landing.

The train also requires some planning. Shin-Osaka is the Shinkansen station, so passengers should allow for the onward journey to their hotel or final destination.

For travellers combining Tokyo and Osaka in one holiday, the choice should come down to the complete itinerary, rather than the flight time alone.

Another booking detail worth checking is the treatment of Nozomi services.

A nationwide Japan Rail Pass does not cover a Nozomi journey on its own. Passholders can use these trains by purchasing the appropriate additional NOZOMI MIZUHO ticket before boarding. Green Car travel also requires the correct pass and supplementary ticket combination.

On our journey, Green Car was peaceful, comfortable and worth the extra fare.

Ordinary Car remains a credible option, particularly if keeping costs down is the priority. The premium cabin earns its appeal through more space, generous recline and useful seat features, rather than an included meal.

For anyone who wants the journey between Tokyo and Osaka to become part of the holiday, Green Car is an upgrade worth considering.