Rock shochu and reggae shochu really do taste different from each other.

The island of Amami Oshima is part of Kagoshima Prefecture, and Kagoshima is usually pictured as making up the southwest tip of the island of Kyushu, one of Japan’s four main islands. Amami Oshima, though, is far, far away from the Kyushu coastline, so far away that the ferry from Kagoshima City takes 13 hours to get there.

▼ The route from Kagoshima City to Amami Oshima, which can alternatively be reached by plane from Tokyo in two and a half hours.

With its remote location, Amami Oshima is famous for its lush mangrove forests, beautiful beaches, and clear, sparkling ocean waters.

Oh, and it’s also famous for shochu, a distilled spirit with longstanding cultural connections to southwest Japan. Specifically, Awaji Oshima’s kokuto shochu, made with rice and brown sugar, is highly prized, and so on our recent visit to the island we didn’t just want to drink some, but also see how it’s made.

We lucked out when we contacted Nishihira Shuzo, an Amami Oshima shochu maker that’s been in business for 99 years, and they said they could offer us a tour of the facility, and a tasting too, with some very unique beverages to sample.

▼ The rustic exterior of the Nishihira Shuzo distillery

Despite being around for nearly a century, Nishihira Shuzo is still a family-run operation, and we were told that the fourth-generation owner of the business would be our guide. With shochu being a high-alcohol drink with an old-school vibe, our mental knee-jerk reaction was to expect a stern-looking, silver-bearded gentleman, but instead we were warmly greeted by Serena Nishihira and her friendly smile.

▼ Serena Nishihira

In addition to being a skilled shochu distiller and businesswoman, Nishihira is also a musician, which is something that’ll come into play later on. To start, though, she led us into the distillery’s production area.

As mentioned above, Nishihira Shuzo’s shochu is made from rice, so steaming the grains is the first step in making it. The distillery has a gigantic cylinder-shaped apparatus that’s used for washing and steaming, with a typical batch using about 400 kilograms (882 pounds) of rice.

Once the rice is cooked, it’s taken out of the drum and sprinkled with koji, a fermentation-triggering type of mold that’s also used in making sake. The rice is then put on racks in a temperature-controlled environment for its initial fermentation.

The next morning, the rice is put into jars with yeast and water to ferment for an additional five days. This isn’t a step that all shochu makers include in their process, but Nishihira Shuzo says it’s a key element of theirs.

After its time in the pot, the mixture is transferred into tanks and combined with liquified brown sugar, then given another two weeks to ferment.

That produces the fermented mash which is then distilled.

But that doesn’t mean Nishihira Shuzo can whip up a whole batch of kokuto shochu, start to finish, in just three weeks, because the final step (before bottling) is to age the shochu in tanks for at least one full year.

From a 400-kilogram load of rice, Nishihira Shuzo can produce roughly 800 1.8-liter (60.9-ounce) bottles of shochu. Luckily for us, some of those bottles end up in the distillery’s tasting room, which was the next place that Nishihira led us to.

The tasting room has chairs, a projector, and a screen set up for use for group events or musical performances, but we had the place to ourselves on this day.

Nishira poured us a selection of the company’s products, and we found them all extremely enjoyable. But just when we thought things couldn’t get any better, she led us through a door at the back of the room where we saw this.

Those are shochu barrels with speakers attached to them. And not some little mini speakers that you might have set up in your kitchen to listen to tunes while you cook, but concert-size amps!

This is where the Nishihira’s Sonic Aging Project takes place. While the speakers were quiet as we looked at them, Nishihira turns all of them on when the distillery starts its shift for the day, and has them play for eight hours. Different amps play different genres of music, with a total of six styles: house, reggae, hip-hop, Latin, rock, and shima uta, or Japanese southern island folk songs.

“We play the music at high volumes,” Nishihira explained, “Depending on the genre, the music produces different vibrations within the barrels, and we want to see how that affects the shochu.”

▼ The shima uta barrel

Like we said, Nishihira is a musician, so at first the idea of playing music for the shochu sounded like a whimsical, creative, but ultimately inconsequential idea. Nishihira, says, though, that with the barrels being music-treated for roughly 2,000 hours in a year, it really does make a difference.

Genres with more bass produce stronger vibrations in the barrel, and also with the shochu itself. That increased interplay between the container and its contents causes the wood to have a more significant influence on the color and flavor of the shochu that’s aging inside.

To prove this, Nishihira ushered us up to the second floor of the tasting area to try some of the Sonic Aging Project series.

Out of the six music genres, Nishihira says that reggae produces the strongest vibrations, and shima uta the softest. So we definitely wanted to taste those two, and she also poured us some of the rock shochu, which is somewhere between the other two in the spectrum.

And you know what? We really could taste the difference! The reggae shochu was darker in color and had a rich flavor with some notable bitter notes from the wood. The shima uta shochu, meanwhile, was lighter in color and sharper in taste, with a more pronounced sensation of alcohol. The rock shochu, sure enough, was a mid-point between the more distinct characteristics of the reggae and shima uta.

So which of the Sonic Aging Project shochu styles is the best? There’s actually no answer to that, Nishihira says. Just like your favorite musical genre is a matter of personal taste, so too will different people have different rankings for how much they like the different types Sonic Aging Project shochu, and they’ve all got their own unique charms.

Reservations for Nishihira Shuzo tours can be made through their website here, but if you can’t make it all the down to Amami Oshima, they also offer their shochu, including the Sonic Aging series, through their online store here.

Related: Nishihira Shuzo official website
Photos ©SoraNews24
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