Swift Kingdom is a one-person jam kitchen in Fukuoka, making small-batch fruit preserves from locally sourced produce. Each jar is cooked in open copper pots, labelled by hand, and shipped within a week of sealing.

PRESERVEJam made the slow way

The kitchen behind the jar

Somewhere between the orchard and the jar, a season gets caught and held still for a little while longer.

Why the jars taste differentDaiki Fukuda started Swift Kingdom in the autumn of 2018 after a decade working in food distribution, mostly moving fruit from Saga and Nagasaki prefectures to supermarket chains. He knew the supply chain well enough to know which fruit never made it to shelves because it was the wrong size or the wrong shade, and he found that quietly maddening. The first batch of jam he made was a fig preserve using undersized figs from a farm in Saga that would otherwise have been composted. It was too sweet and the set was uneven, but a neighbour ate the whole jar in two days and asked for more.

How to get a jar

The first batch was too sweet and the set was uneven, but the neighbour ate the whole jar in two days.— Swift Kingdom
With respect

What people say

"The sudachi and honey jar arrived on a Friday and was gone by Sunday. I have never eaten jam that fast in my life."
Yuki TanakaMonthly subscriber, Fukuoka
"We stock three Swift Kingdom varieties at our cafe. Customers ask about the jars more than they ask about the coffee, which tells you something."
Haruto ShimizuCafe owner, Hakata-ku

Two voices from the Fukuoka table, a monthly subscriber and a cafe owner. Individual experiences vary.

News & Announcements

News & Announcements

2026-10-05

Making persimmon jam in autumn: what to know

Persimmon season in Japan runs from October through December, depending on the variety and the prefecture. It is one of the few fruits that is genuinely better cooked than raw, at least for jam purposes, because the heat transforms the tannins in a way that raw eating never quite resolves.

Read the persimmon jam guide →
2026-09-18

Why open-pot cooking makes better jam

Most jam made at industrial scale goes through a vacuum evaporator: a sealed vessel that boils water off at…

2026-09-05

Sudachi versus yuzu: which citrus makes better jam

Yuzu gets most of the attention in Japanese cooking, and for good reason. But for jam, sudachi is worth a…

See all news →
4Kg
Fixed batch size, every time
18
Varieties made across the year
340+
Batches logged since 2018
Data kept private
Your data is yours, always.
Eco-conscious
Recycled packaging, low waste.
Hand-finished
Every piece touched by a maker.