by Lawson Dibb
Now, this isn’t your typical doctor’s appointment. This is a very special doctor — one that visits Osaka only around six to eight times a month, with no official schedule. But if you’re part of the right online circles, scrolling through social media or checking insider LINE groups, you might just catch wind of when this “doctor” is in town.
I’m talking, of course, about the legendary Doctor Yellow — the iconic Shinkansen test train that travels the length of Japan. You can’t ride this train; instead, it runs diagnostic checks to identify track damage or other issues for JR to repair. Since it runs without a published timetable, spotting Doctor Yellow is a rare and lucky occurrence — especially for those outside the community of densha otaku (train enthusiasts).
During my time working as a travel agent and in destination marketing, I developed a real appreciation for Japan’s rail journeys. Doctor Yellow quickly became a bucket-list item, and I was determined to catch a glimpse of it while working in Japan at EXPO.
Through a mix of blogs and insider chatter, I heard rumours that Doctor Yellow would be running on June 27 and 28 — coinciding perfectly with my days off while my parents were visiting from Australia. Although these dates are never officially confirmed, Doctor Yellow always follows a two-day route: the first day from Tokyo to Hakata, and the second day returning back. So if it’s spotted on day one, the return is all but guaranteed.
As luck would have it, everything lined up, and we were able to witness Doctor Yellow in all its bright yellow glory.
This wasn’t actually my first encounter. I had previously seen it from Shin-Osaka Station back in April. This time, I brought my dad — an avid rail fan — to Shin-Kobe Station, where we snapped photos and soaked in the moment together. Shin-Kobe is especially unique: it has just two Shinkansen tracks and is flanked by tunnels on either side, creating a dramatic and memorable viewing experience unlike the larger, multi-track stations like Shin-Osaka or Tokyo.
Doctor Yellow has become a beloved pop culture icon in Japan — admired by rail fans, families, and children alike. And for those lucky enough to see it, it’s a moment that truly stays with you.