The Complete Cosplay Summit Dining Guide for Nagoya Visitors

Here's something that surprises most first-time attendees of the World Cosplay Summit: roughly half the people who come to Osu for the event end up spending more time eating and exploring the neighborhood than they expected — and many say the food discovery was the part they talked about most when they got home. Not the stage. Not the competition. The lunch they almost didn't plan for.

That's the thing about Osu. It has a way of doing that to you.

If you're arriving in Nagoya for the World Cosplay Summit this September — whether you're competing, cheering, photographing, or just soaking in the energy of Japan's most famously eclectic neighborhood — this guide is for you. Specifically, for the version of you who doesn't want the meal that every other tourist is eating. The version who wants to find the place where Japanese foodies actually go.

Who This Is For

• ✅ World Cosplay Summit attendees looking for a memorable lunch in Osu between events
• ✅ Repeat Japan visitors who want an authentic food discovery beyond mainstream guidebook picks
• ✅ Wagyu enthusiasts curious about what Nagoya's food scene offers beyond the famous chains
• ✅ Travelers in costume or kimono who want a welcoming, relaxed restaurant where they can sit and enjoy without rushing
• ✅ Anyone who wants a great story to bring home — a dish, a place, a moment that's genuinely theirs to tell

Why Osu Is More Than a Cosplay Venue

Osu has been called many things — Nagoya's Akihabara, a living overlap of old and new, a neighborhood where a 400-year-old Buddhist temple sits comfortably next to a maid café. All of that is true. But what doesn't make it into most English travel guides is that Osu is also one of Nagoya's most interesting dining districts, particularly for specialty restaurants that do one thing exceptionally well.

This is precisely the kind of neighborhood where repeat visitors to Japan — especially those from Hong Kong (29.7% of whom have visited Japan ten or more times) and Taiwan (19.4%) — have started redirecting their attention. The Golden Route of Tokyo, Kyoto, and Osaka still delivers. But Nagoya is where the real discoveries happen now. Osu, in particular, rewards the curious.

The World Cosplay Summit draws participants and spectators from across the globe, many of whom spend the surrounding days exploring Nagoya rather than rushing back to a Shinkansen platform. September in Nagoya is still warm, the streets are lively, and the neighborhood around Osu Kannon Temple is exactly the kind of place that rewards slow walking and unplanned stops.

Which brings us to a restaurant that most tourists walk past without noticing — and that regular visitors to Nagoya quietly keep coming back to.

The Hidden Gem That Locals Already Know About

Itadaki — The Original Rare Wagyu Gyudon — is a small, 18-seat lunch restaurant on the second floor of a building in Osu, a four-minute walk from Yabacho Station. It was founded in 2022 by Masayuki Goto, who spent nearly two decades running MAX'S BAR in Nagoya before launching an entirely new concept: a specialty restaurant dedicated to a single dish — Rare Wagyu Gyudon — using ingredients sourced entirely from Aichi Prefecture.

The idea started during the COVID-19 pandemic, when Goto watched small local farms struggle with unsold harvests. He'd been sourcing from these producers for years. Rather than standing by, he built a restaurant concept around them — a direct farm-to-table model that would support Aichi's food producers long-term while creating something that had never existed before in Japanese cuisine.

His question at the time was deceptively simple: every classic Japanese rice bowl has a premium version — kaisendon, oyakodon, katsudon. Why didn't gyudon? It had always been treated as fast food. No one had ever asked what it could become.

Goto asked. Then he built the answer.

For a deeper look at what makes Rare Wagyu Gyudon a category of its own, that full story is worth reading before your visit.

What You're Actually Eating — and Why It Matters

The signature bowl at Itadaki features Horai Wagyu — a Japanese black wagyu produced exclusively in Okumikawa, Aichi Prefecture. Only 300 heads are raised annually across just three farms in Japan. These cattle are fed on sake lees from Horaisen Sora, a local premium sake, which contributes to a flavor profile that's genuinely unlike anything else: a light marbling that carries lean meat depth in a way that heavy marbling sometimes doesn't.

The "rare" texture — which is the heart of the experience — is achieved through a proprietary two-stage cooking technique developed by Goto. The beef is heated to over 70°C at the core, fully meeting Japan's Ministry of Health, Labour and Welfare food safety standards, while preserving the soft, silky mouthfeel that the word "rare" implies. It's a technical achievement that took genuine research to develop, and it's one of the reasons Itadaki has been featured on eight major Japanese TV programs, including NHK.

Every ingredient comes from Aichi Prefecture. The rice is "Aichi no Kaori," grown locally. The miso soup is made with Hatcho miso from Okazaki City. The pickles are traditional Atsumi Ichō-zuke from the Atsumi Peninsula. The egg is Nagoya Cochin, from Yamada Poultry Farm. The sauce — what the team calls the "magic sauce" — is built on white soy sauce from Hekinan City, blended with wine.

The Horai Wagyu bowl (Shinkoccho, 100g beef, 200g rice) is priced at ¥2,700. It's limited to 10 bowls per day.

If Horai Wagyu sells out before you arrive, the Mikawa Beef Rare Gyudon (starting at ¥1,800) is always available — same rare-style preparation, same Aichi-sourced everything, and a deeply satisfying bowl in its own right.

✓ Key Takeaways

• Itadaki is a 4-minute walk from Yabacho Station — right in the heart of the Osu district, walking distance from the World Cosplay Summit venue area
• Horai Wagyu is one of Japan's rarest wagyu breeds: 300 heads per year, from 3 farms, available in only 10 bowls daily at Itadaki
• The rare-style texture is achieved safely through a proprietary two-stage cooking technique — fully certified under Japanese food safety law

Dining in Osu Before, Between, or After the Events

The World Cosplay Summit schedule leaves pockets of time that are easy to fill well, if you know where to go. Here are a few natural moments to build a lunch visit into your day:

Morning arrival, pre-event lunch: If you're heading to Osu from Nagoya Station in the morning, Itadaki opens at 11:00 on Saturdays and Sundays. You can be seated close to opening, enjoy a relaxed lunch, and still have time to walk through Osu Shopping Street or stop at Osu Kannon Temple before the day's events begin. The sofa seating is particularly comfortable if you're in costume — plenty of room to sit without worrying about the outfit.

Mid-day break between events: Yabacho Station is the closest stop (Exit 4, Meijo Line), and from there it's a four-minute walk to the restaurant. Last order is 30 minutes before the 15:00 closing time, so a mid-afternoon lunch is absolutely possible on most event days.

The day after — while others are at the airport: If you're extending your stay in Nagoya by even one extra day, a Monday or Tuesday visit works too. Itadaki is open Monday and Tuesday as well, same hours.

On public holidays, the restaurant opens at 9:00 — earlier than usual — which creates a rare window for a genuinely early wagyu experience before the day's crowds build anywhere.

Cosplay outfits and kimono are both welcome. There's no dress code. Guests have come in full competition costumes and spent a comfortable hour over their bowls. The staff are used to it, and genuinely enjoy it.

For guests who want to see exactly which days Itadaki is open during September, the monthly schedule is posted on Instagram — worth checking before you arrive, since irregular closures can apply.

"I traveled to Nagoya specifically to eat here — it was 100% worth it."

— Guest review

That's a line that comes up more than once in the reviews. And it says something specific: this isn't the kind of place people stumble into and think, "oh, that was fine." It's the kind of place people plan their Nagoya stop around. For World Cosplay Summit visitors already in the neighborhood, the bar to visit is even lower — Itadaki is practically on the way.

Practical Details for Cosplay Summit Visitors

Getting there: 4-minute walk from Yabacho Station Exit 4 (Meijo Subway Line). Also within walking distance from Osu Kannon Station and Kamimaezu Station. From Nagoya Station, take the Higashiyama Line to Sakae, transfer to the Meijo Line, and get off at Yabacho — about 10 minutes total.

Hours during the Summit period: Saturdays and Sundays 11:00–15:00 (last order 14:30). Public holidays 9:00–15:00. Mondays and Tuesdays also open 11:00–15:00. Wednesdays, Thursdays, and Fridays are closed. Lunch only — no dinner service.

Reservation: For Horai Wagyu specifically, reservation via Tabelog is strongly recommended. With only 10 bowls available per day, they can sell out during peak event periods. Mikawa Beef is always available without reservation, but booking a seat in advance avoids any uncertainty.

Language support: Printed menus in English, Simplified Chinese, and Korean. A photographic five-step guide explains exactly how to enjoy the dish — no Japanese required to navigate the experience.

Payment: Credit cards accepted. Apple Pay and Google Pay also available.

Seating: 18 seats total, all table seating with comfortable sofa-style chairs. Counter seats available for solo diners. No private rooms.

If you're planning a broader Nagoya itinerary around the Summit, this guide for second-time Japan visitors navigating Nagoya lunch covers additional context for exploring the city beyond the main event.

The Osu Discovery That's Worth Telling

The World Cosplay Summit gives you an incredible reason to be in one of Nagoya's most distinctive neighborhoods. Most visitors will spend their time on the main streets, in the well-documented shops, eating at places that appear first in the search results.

But if you're the kind of traveler who comes back from Japan with stories that your friends haven't heard — the restaurant up the stairs, the bowl you didn't know you were looking for, the flavor that turned out to be the most memorable thing you ate on the whole trip — Osu has exactly that waiting for you.

A specialty restaurant focused on a single dish. Ingredients from farms most visitors have never heard of. A concept that didn't exist until someone decided it should. That's Itadaki.

For our complete menu, access details, and store information, visit our official page at https://itadaki8.com/english/