The World’s First: Japan’s Viral Cold-Water Instant Noodles

What Is Hiyashi Cup Noodle?

If you’ve seen Japanese food videos flooding your feed lately, there’s a good chance they feature a cup of instant ramen made without a kettle. That’s Nissin’s Hiyashi Cup Noodle (“hiyashi” means “chilled”) — the first Cup Noodle in the brand’s history designed to be prepared entirely with cold water instead of boiling water.

Nissin invented instant noodles back in 1958 and Cup Noodle itself in 1971, so a cold-water version is a genuinely new category for the 55-year-old product line — and it’s exactly the kind of “wait, that actually works?” novelty that spreads fast on social media.

Why Cold Instant Noodles Are Going Viral

A few reasons this trend caught fire across Japanese social media and beyond:

• The “no kettle needed” hook. Instant noodles have relied on boiling water for almost 70 years. Pouring cold water into a cup and getting real ramen five minutes later feels like a magic trick — perfect short-video material.
• Perfect summer timing. The product launched July 20, 2026 in the middle of one of Japan’s most severe heatwaves, making a no-heat meal genuinely useful, not just a gimmick.
• Scarcity fueled hype. Nissin expected its initial stock to last one to two months. It sold out in about a week, and “I finally found it” unboxing videos became their own subgenre of content.
• Built-in food-science curiosity. The noodles use a newly patented “Cold Rehydrate” process developed over five years specifically to let noodles soften in cold water — a detail that taste-test and ASMR-style food creators love to explain on camera.
• Two shareable flavors. Spicy Kimchi and Chicken Salt Lemon — both visually distinct and bold enough to react to on video.

How to Make Hiyashi Cup Noodle (No Stove Required)

1. Peel back the lid to the fill line.
2. Add cold water straight from the tap or fridge.
3. Reseal the lid and wait about 5 minutes (slightly longer than the 3 minutes for a regular hot-water Cup Noodle).
4. Stir and eat — no boiling, no waiting for a kettle.

Reviewers who tested it noted the noodles stayed springy with a slight extra bite rather than turning mushy or undercooked, which is the main skepticism people have before trying it on camera.

Watch People Try It

The Bigger Picture: A New Category for Instant Food

Beyond the viral moment, food industry watchers see Hiyashi Cup Noodle as a genuine format shift, not just a summer limited edition:

• It opens up heat-free eating occasions — commuting, hiking, camping, office desks, and emergency stockpiles — where boiling water isn’t always available.
• Nissin holds nearly half of Japan’s instant noodle market, and rivals like Toyo Suisan and Sanyo Foods are expected to respond with their own cold-water formats.
• The launch coincided with Cup Noodle’s 55th anniversary, positioning it as a legacy-brand reinvention rather than a one-off gimmick.

FAQ

What flavors does Hiyashi Cup Noodle come in? Spicy Kimchi and Chicken Salt Lemon.

How much does it cost? Around 285–307 yen (roughly $1.90–$2 USD) per cup.