Creating a Fermentation Corner in a Small Incheon Kitchen

Last winter, I placed a kimchi container next to the sink in my studio apartment (which doubles as my workspace) and cleared it away after just three days. The reason was simple. Every time I opened the lid, it felt like the brine would splash onto the tablet I was working on. And it actually did once. Red pepper flakes staining an illustration deadline file is not something you want to see.

Over the next two months, I reorganized my kitchen workflow, switched containers, and tracked temperatures, eventually carving out a fermentation corner in one side of my roughly 4 m² kitchen. Here are the questions I asked myself throughout that process.

Where do I actually put it when space is this tight?

At first I thought about the shelf above the sink, but fermenting containers subtly shift their center of gravity as gas builds up inside. Placing them up high makes them dangerous to take down. The spot I ultimately chose was the gap between the fridge and the wall (about 25 cm wide). I put a three-tier stainless steel shelf unit in there. I bought an assembly-type shelf from Daiso for around ₩15,000 and adjusted the height of each tier to fit my containers.

The order matters: decide on container size first, then match the shelf to it. Do it the other way around, and you'll end up hunting for containers that fit the shelf. I set a strict limit of containers no wider than 20 cm and no taller than 18 cm. Having constraints actually reduces decision fatigue. It felt similar to the principle in procedural generation where narrowing the parameter range produces more consistent results.

What containers should I use?

Here's a table summarizing what I compared.

Container	Pros	Cons	My verdict
Glass airtight container (1L)	Contents visible, doesn't absorb odors	Heavy, can break	Adopted for pickles
Plastic kimchi container (2L)	Lightweight, affordable	Absorbs color and odor	Dedicated to kimchi
Fermentation vessel with airlock	Automatic gas release	Bulky, expensive	On hold due to lack of space

For glass containers, I bought two Lock & Lock 1L ones. I alternate between cucumber pickles in one and onion pickles in the other. Since kimchi is going to leave its smell no matter what, I just designated one plastic container exclusively for it.

How do I manage the temperature?

Temperature determines almost everything in fermentation. The indoor temperature of a studio apartment in Incheon easily exceeds 30 °C in summer, and my kimchi turned sour within a single day on two occasions.

The solution wasn't anything elaborate. I stuck a digital thermometer (about ₩8,000 including battery) on the middle tier of the shelf and logged the temperature in a smartphone memo every morning and evening. After about two weeks of data, a pattern emerged. The hottest period was between 2 and 5 PM, but because the shelf was next to the fridge, it stayed about 2 °C cooler than the wall side even during those hours. My guess is that waste heat from the fridge created convection, drawing hot air upward. In any case, that spot was the most stable.

When room-temperature fermentation goes too fast in summer, I leave things out for half a day and then move them to the fridge to control the timing. I named this method "semi-room-temperature fermentation."

What about the smell?

Honestly, there was no perfect solution. On the day I make kimchi, I ventilate as much as possible and push my work to another day. With airtight containers, there's almost no leakage under normal circumstances, but the moment you open the lid is the problem. The most practical method I found: turn my face away when opening the lid and quickly scoop out only what I need. Embarrassing to call it a technique, but it works.

Pickles are far less of an issue smell-wise. There's just a faint vinegar scent, and I've actually felt at times that it makes the kitchen seem cleaner.

Things that failed

It wouldn't be fair to write only about successes, so here are the failures too.

I made mul-kimchi (water kimchi) in a 1L glass container, and the fermentation gas forced the lid open, sending brine flowing down the shelf. I got up at 2 AM to mop the kitchen floor. That's when I learned that mul-kimchi in a glass container should be filled to no more than 70% capacity. Another one: I made onion pickles with a water-to-vinegar ratio of 2:1, and they turned out so sour they were barely edible. Now I use water 3 : vinegar 1 : a bit of sugar.

Fermentation has quite a lot in common with debugging. It's a process of fixing variables one at a time after each failure. If you change more than one thing at once, you can't tell what caused what, so I change only one variable per batch.

Right now, the shelf holds one kimchi container, two pickle jars, and one thermometer. That's all. At first I was ambitious enough to try kombucha and sourdough too, but once I accepted that three containers is the limit of what I can reliably manage in this space, things actually got easier. Whether it's fermentation or a kitchen, reducing parameters stabilizes the system.