Mars Iwai Haru: Japanese Whisky Finished in Sakura Casks

Cherry blossom wood is a strange thing to make a whisky cask out of.

It isn't oak. It's harder to work, less porous, and there's no long tradition of aging spirits in it.

Mars does it anyway, once a year, for spring.

What Is Iwai Haru?

Haru means spring. It's the first release in Hombo Shuzo's seasonal cask series out of Mars Komagatake in Nagano.

The base is Iwai Tradition, 70% malted barley, 30% corn, no age statement, aged primarily in ex-bourbon and ex-sherry casks. It then spends an additional six months in sakura casks made from Japanese cherry blossom trees.

Limited annual release. Non-chill filtered, 40% ABV.

What Sakura Wood Actually Does

This is worth understanding, because "cherry blossom cask" sounds like marketing and isn't.

Sakura wood is dense and tight-grained. It doesn't hand over vanilla and caramel the way charred American oak does. What it gives instead is aromatic, a soft floral lift and a faint almond sweetness, closer to a fruit brandy than a bourbon barrel.

Six months is enough to pick that up without the wood turning tannic and bitter, which is the real risk with a hardwood like this.

Flavor Profile

Nose: Honey, straw, apricot jam, floral highlights

Palate: Round and brandy-like, soft through the middle

Finish: Cotton candy, ripe red berries

The brandy comparison is the honest one. Poured blind, plenty of people guess Calvados before they guess Japanese whisky.

Why We Poured It

Because it doesn't taste like anything else we have. Peated, sherried, rice, koji. We had all of those. We had nothing floral.

This is the whisky for someone who says they don't really like whisky. It comes in soft and doesn't demand much. It's also the one we hand gin drinkers, because the aromatic register makes sense to them right away.

How to Drink It

Neat, at room temperature. Chilling it kills the nose, which is most of the point.

If you want it long, use soda rather than ice and water, a highball keeps the florals suspended better than dilution does. Go easy on the pour of soda.

Pair It With

Light and clean. Handrolls, especially salmon avocado or the inaka mushroom roll. Agedashi tofu. Steamed buns.

Skip fried food with this one, the oil buries the aromatics.

Try It at Juraku

Available now at Izakaya Juraku, Lower East Side. Ask for Iwai Haru and we'll pour it neat first.