Today, a brand new 273 series train entered into limited express Yakumo services that connect Okayama and Izumoshi in western Japan. This article focuses on the new and old trains and briefly looks back its history with timetables.
Origin of its name
Day-time limited express trains of Japanese National Railways and JR Group are usually named after birds or names of places. For example, Shirasagi (Nagoya – Tsuruga) means egret and Azusa (Shinjuku – Matsumoto) was named after Azusa River. Yakumo is neither of them. Its origin is an ancient Japanese phrase "yakumo tatsu" (八雲立つ) that has been used in poems, first appeared in the oldest literary work in the country called Kojiki that dates back to 712 AD.
"Yakumo tatsu" literally means countless clouds coming up the sky, and this phrase is mostly followed by the word "Izumo" in ancient poems such as waka. Those who are interested in it should also check makura kotoba (lit. pillow words).
The new Yakumo
Limited Express Yakumo has been connecting Okayama and Izumoshi via San-yo Main, Hakubi and San'in Main Lines since 1982, and it is 220 km (137 miles) long. There are 15 services a day on each direction (i.e. hourly), though some of them do not run on certain days. The fastest service takes 2 hours and 57 minutes.
The 273 series was developed specifically for Yakumo. Hakubi Line is known for having tight curves with steep gradients as well as heavy snow in winter. These severe conditions did not allow ordinary trains running fast safely and comfortably so that JR West decided to introduce the brand new trains rather than reallocating redundant train units from other places. According to the company, computer-controlled tilting features of the 273 series make train far more comfortable than old rolling stock.
Six out of 15 Yakumo services are provided by the new trains so far, and the other nine will also be the 273 series by 15 June this year. Each service is formed of four coaches, but some of them could be formed of eight during holidays.
Old Yakumo
381 series has been in service since electrification of Hakubi and San'in Main Line in 1982. Today, it is often called the last electric train that Japanese National Railways introduced. Though it is highly popular among railway enthusiasts in these days, it had been infamous for uncomfortable rolling as local TV station reported so just three months after the introduction.
There are a few reasons why the 381 series is so uncomfortable. One of them is that because its tilting feature is not computer-controlled but dependent on centrifugal force. The train tilts a few seconds after entering a curve and restores to the original position a few seconds after leaving the curve.
JR West converted a few intermediate carriages to so-called "Panorama Green Car", first class which passengers can enjoy views while on a train, but it was not clear whether it could distract them from motion sickness.
All remaining 381 series carriages were dramatically refurbished in 2007-11. JR West calls them "yuttari Yakumo", which means "relaxing Yakumo". However, even with new seats and clean toilets did not improve the bumpy ride and rolling. Hence, railway enthusiasts made parodies of the brand: "guttari Yakumo" (lit. "exhausting Yakumo") or even "guttari hakumo" (lit. "exhausting & vomiting").
The last regular service provided by the 381 series will be Yakumo 1 (Okayama 7:05 → Izumoshi 10:18) on Saturday 15 June 2024. However, the company notes that a few 381 series units might be used during holidays and when there is a lack of available train. It is expected that the old train remains for a while, possibly until early-2025.
Comparing timetables
It might be interesting to compare old timetables. Here are fastest Yakumo services in 2024, 1982, 1973 and 1968.
Alphabets for coach layouts mean as follows:
G for Green Car (first class) with seat reservation,
D for a dining car,
N for standard class WITHOUT seat reservation, and
R for standard class WITH seat reservation.
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