High Time for Summer Time
Tuesday, May 29, 2012 at 3:41PM

When I woke this morning, my bedroom was bathed in warm sunlight. Not yet six in the morning and the sun was already peaking over the neighboring buildings and coming in through the windows.
“What a waste,” I thought as I pushed myself out of bed.
Japan is not what I would call a morning country. Coffee shops and sports clubs don’t open till seven or eight at the earliest. Many of the better bakeries are still closed at nine-thirty, and few restaurants bother to serve the most important meal of the day, breakfast. Contrast that with the States where you can work out at the gym from five in the morning and promptly nullify the benefits of all that iron-pumping by gorging yourself on blueberry pancakes and bacon at six.
And yet, as the nation’s salarymen cover their heads with their pillows and try to sleep off their hangovers, the sun has been shining for two, three, and even four hours. This morning in Kyûshû, for instance, the sun rose at 5:10. In Tôkyô, daybreak was at 4:27. And, in Sapporo dawn cracked at a remarkable four a.m.[1], which begs the question of why Japan doesn’t have two time zones.
But let’s not get ahead of ourselves. First thing’s first: Japan needs to re-adopt daylight-saving time (DST).
Re-adopt, you ask? Yes, during the American occupation, Japan did observe DST for a spell, but abandoned it in 1951 when MacArthur left. For the average person in post-war Japan that extra hour of daylight in the evening equated with little more than an extra hour of labor.
But that was then and this is now.
With all fifty-four of the nation’s nuclear power plants now idled indefinitely, Japan faces the daunting task of not only producing enough electricity, but also bringing consumption down during the summer months precisely at the time when energy demand usually peaks. Failure to do so could lead to a repeat of the disruptive blackouts that plagued Japan last summer when the nation still had eleven nuclear reactors online. Daylight-saving time, and specifically “double summer time”, may provide the answer.
While the energy-saving benefits of DST are still being debated in the West, an interesting study conducted at the Toyohashi University of Technology[2] has shown that the implementation of a “split summer time” in Japan—whereby the southwestern half of the country moves its clocks an hour forward in April; the northeastern half of Japan, two, that is, double summer time—could provide considerable savings in energy consumption.
The benefits of DST, however, wouldn’t end there. According to The Economist, “adopting DST would mean a new dawn for the Japanese economy. One extra hour of sunlight every evening for seven months would boost domestic consumption, as people leave work for bars, restaurants, shopping and golf. Summer time is credited with reducing traffic accidents and crime; boosting energy efficiency as people use less lighting and heating; and even improving health as people are radiated with vitamin D.” The economic benefit, the article continues, could add as much as \1.2 trillion ($15 billion) to Japan’s GDP and generate 100,000 jobs.[3]
Coming from America’s northwest where the sun can set as late as nine in the evening during the summer, I don’t need to be sold on the benefits of daylight-saving time. Summers, thanks to a simple biannual adjustment of the clock, have always been a time for late evening barbecues with family, twilight concerts in the parks, and relaxed meals at outdoor cafes with friends. The challenge, however, lies in convincing the average Japanese that, in addition to the conservation benefits of extra sunlight in the evening, DST could mean a better quality of life, not just more work.
Until then, all that beautiful sunlight will continue to be squandered.
[1] Around the summer solstice, sunrise comes as early as three-thirty in Hokkaidô.
[2] Fong, Wee-Kean, et al., “Energy Savings Potential of the Sumer Time Concept in Different Regions of Japan From the Perspective of Household Lighting”, Journal of Asian Architecture and Building Engineering, November 2007, p.371-78.
[3] “Bright idea: a ray of hope for the land of the rising sun”, The Economist, 28 October 2010.






