River Light's Kiwame Premium pans are the easiest way to start cooking with iron, because the iron is nitrided. That single difference changes how you set the pan up and look after it. The good news: you do not need to burn-in or pre-season a River Light pan the way you would a raw carbon steel wok. Look after it with a few simple habits and it will become naturally non-stick and last for decades.
The quick version
- No burning-in needed. River Light iron is nitrided, so it is rust-resistant straight out of the box.
- Before first use, warm a little oil in the pan, pour it out, and wipe (a one-time "oil acclimation").
- Before every cook, heat the pan, swirl in oil, pour off the excess, then add your food.
- After cooking, hand-wash in warm water with no harsh detergent, and dry it over heat.
- Never use the dishwasher, and preheat slowly on induction so the base does not warp.
Why there is no burning-in
Most raw iron and carbon steel pans arrive with a protective coating that has to be scrubbed off and then "burned in" over high heat, often outdoors, before you can cook. River Light pans are different. The surface is treated so that layers of iron nitride and iron oxide form on the steel, which makes the pan strongly rust-resistant straight away. There is no coating to burn off and no lengthy ritual. You go from box to cooking in about five minutes.
Step 1: Acclimatise the pan to oil (once, before first use)
This one-time step primes the surface so food releases cleanly.
- Wash the new pan in warm water with a soft sponge and dry it.
- Pour in enough cooking oil to fill roughly one third of the pan.
- Heat on low for about five minutes. The oil should warm gently, not smoke.
- Turn off the heat and pour the oil back into a heatproof container (keep it to reuse for this).
- Wipe the inside with paper towel, leaving a thin film of oil behind. Ready to cook.
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Step 2: The oil return (before every cook)
This fifteen-second habit is the single best way to stop food sticking.
- Heat the empty, dry pan over medium until it is hot.
- Add a tablespoon or two of oil and swirl it around the surface and up the sides.
- Pour the excess oil back out, then add the fresh oil or butter you are cooking with.
- Add your food. A preheated, oiled pan releases eggs, fish and stir-fries far more cleanly than a cold one.
Step 3: Wash and dry after cooking
Iron pans are low-maintenance, but they do not like sitting wet.
- Wash by hand with warm water and a soft sponge or brush while the pan is still warm. Avoid harsh detergents, which strip the oil film you are building.
- For stuck-on bits, add hot water and bring it to a brief simmer to loosen them, then wipe away.
- Dry the pan straight away, ideally back on low heat for a minute until completely dry.
- Going away for a while? Wipe a thin layer of oil over the inside first.
- Never put a River Light pan in the dishwasher, and do not leave it soaking in the sink.
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Iron performance, without the cast-iron weight
A River Light pan gives you the heat retention and searing power people love about iron, but at roughly half the weight of cast iron. Because the pans are forged from thin steel sheet for Japanese kitchens, they are light enough to toss a stir-fry, roll an omelette or lift a full wok one-handed, with none of the heft and wrist strain of a cast-iron pan. They also heat up far faster, so you spend less time waiting for the pan to come up to temperature.
Cooking on induction
The Kiwame Premium frypans, Peking woks and tamagoyaki pans are induction (IH) compatible, with one rule worth knowing: always bring the pan up to temperature slowly. A thin iron base heated too quickly on a powerful induction element can warp, lifting in the middle into a raised "donut" shape so it no longer sits flat. Start on a lower setting, let the pan heat gradually, and it will stay flat for years. The two-handle round-bottom Chinese woks are made for gas, halogen and radiant cooktops rather than induction.
Avoiding rust and pitting
- Dry the pan after every wash and keep it lightly oiled. Surface rust usually just means it was put away damp.
- Do not strike the cooking surface hard with metal tools. A sharp knock from a metal ladle or spatula can crack the nitrided layer, and if salt or vinegar then seeps into the crack it can cause pitting. The matching River Light nitrided iron ladle is shaped to work with the pan, but treat any metal tool gently against the surface.
- Try not to leave acidic or very salty foods (tomato sauces, vinegar, soup) sitting in the pan after cooking. Move them out, then wash and dry as usual.
Quick fixes
Food is sticking. Almost always the pan was not hot enough, or you skipped the oil return. Preheat properly, do the oil return, and give the pan a few cooks to build its patina.
A few rust spots appeared. Scrub them off with a non-metal scourer and a little oil, rinse, dry over heat, and re-oil. The pan recovers easily.
Rescuing a badly stuck or burnt pan
Even a pan with food burnt hard onto it can be brought right back to life, with no harsh chemicals. Here is the full rescue, step by step.
You will need: hot water, a wooden spatula, a scourer or metal scrubbing brush, and a little cleansing powder.
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Once it is clean and dry, re-season it exactly like a new pan using the four oil-acclimation steps near the top of this guide, and it is ready to cook with again.
The patina payoff
Every time you cook, a microscopic layer of polymerised oil builds on the surface. Over weeks the pan darkens and becomes genuinely non-stick, with no coating to wear out or replace. This is why iron cookware is something you buy once. Look after a River Light pan and it will outlast every non-stick pan you would otherwise have thrown away.
Frequently asked questions
Do I need to season a River Light pan before using it?
Not in the traditional burn-in sense. Because the iron is nitrided, you only need the one-time oil acclimation above, then an oil return before each cook.
Can I use dish soap?
A little mild soap occasionally is fine, but avoid harsh detergents and heavy scrubbing, as they strip the oil film. Warm water and a soft brush is usually all you need.
Why does food keep sticking?
The pan was likely not preheated enough, or the oil return was skipped. Heat the pan first, do the oil return, and give it time to build a patina.
Can it go in the dishwasher?
No. Hand wash, dry over heat, and keep it lightly oiled.
How does it compare to other woks?
River Light Kiwame and Yoshikawa Cook-Pal are both trusted Japanese brands and excellent choices, and both use a nitrided finish that resists rust and seasons easily. They are very close on the metal itself, so the decision usually comes down to handle style and shape rather than performance.
Traditional carbon steel woks from Asian grocers are great too, and many experienced cooks prefer them. They take longer to season, can rust if neglected, and need regular oiling, which is well worth it if you cook on the wok often. River Light Kiwame is the easier choice for a busy home kitchen: the nitrided surface means far less upkeep than untreated carbon steel, with the same high-heat cooking.
About River Light
River Light is a Japanese maker that built its name on a single material: iron. While much of the cookware world moved to disposable non-stick, River Light kept refining steel-sheet pans, on a simple belief that good cooking begins with good tools, the kind you grow more attached to the longer you use them.
Every Kiwame pan is made in Japan from cold-rolled steel that is then nitrided, forming the hard, rust-resistant surface that makes these pans so easy to live with. Each one is shaped, finished and checked by hand, and built to last for decades rather than seasons.
Shop the range
Explore the full River Light collection, including the everyday 28cm iron frying pan and the family-size 33cm Peking wok. Genuine, made in Japan, and dispatched from Melbourne.