Tonoas

Tonoas (formerly written Dublon, and still occasionally called Toloas) is the second-largest island in Chuuk Lagoon, lying just south of the state capital, Weno. To the casual eye it is a quiet, green, intensely traditional Chuukese island of villages, breadfruit groves, and small churches — but Tonoas carries an outsized history. During the Japanese Mandate period (1914–1945) it was the administrative and naval nerve centre of the entire Truk Lagoon base, the so-called "Gibraltar of the Pacific." A bustling Japanese town once stood here, complete with shops, a hospital, a seaplane base, gun emplacements, and command facilities for the Imperial Japanese Navy's Combined Fleet. After the devastating American carrier raid of Operation Hailstone in February 1944, the town was abandoned and the jungle reclaimed it, leaving the island studded with overgrown wartime relics.

For the modern visitor, Tonoas is one of the most rewarding islands in the lagoon for combining land-based WWII history with village life. Most foreign travellers experience Chuuk entirely from a dive boat, swimming the famous sunken wrecks; Tonoas offers the rarer chance to walk among the ruins on dry land — concrete bunkers, rusting coastal guns, tunnels bored into the hillsides, and the bones of the old Japanese administration. It is also simply a beautiful, untouristed place, with friendly people who see far fewer outsiders than Weno does.

The climate is hot, humid, and wet year-round, with daytime temperatures around 27–31 °C (81–88 °F). There is no true dry season, but rainfall eases somewhat from roughly January to April, which is also the prime diving window for the lagoon. Tonoas has no hotels, no real roads in the Western sense, and no nightlife — it is a day-trip island, visited by small boat from Weno. Visitors should dress modestly, ask before photographing people or entering village land, and remember that almost all land here is privately owned by family lineages.

By Plane

There is no airport on Tonoas. The gateway to all of Chuuk is Chuuk International Airport (TKK) on Weno Island, which receives United Airlines "Island Hopper" flights connecting Guam, Pohnpei, and onward to Honolulu. From Weno you continue to Tonoas by boat (see By Car / Road below).

US citizens may enter visa-free under the Compact of Free Association; most other nationalities receive a 30-day entry permit on arrival. The currency throughout is the US dollar.

By Car / Road

The only way to reach Tonoas is by small boat across the lagoon from Weno, a crossing of roughly 15–20 minutes depending on the landing point and sea state. Most visitors arrange this through their hotel, dive operator, or a local guide on Weno; there is no scheduled ferry, though local outboard "taxi" boats serve islanders. Always agree the round-trip fare and pickup time before setting out, and avoid crossing in rough afternoon chop.

Tonoas is explored on foot, usually with a local guide who knows both the trails and the families whose land you'll be crossing. There are no taxis, no rental cars, and no ride-hailing apps anywhere in Chuuk. Footpaths link the coastal villages and climb inland to the wartime ruins; some are muddy, steep, and overgrown, so wear sturdy shoes and bring water. A guide is effectively essential — partly to find the often-hidden relics, and partly because access to many sites requires the permission (and frequently a small fee) of the landowning family.

A few villages can also be reached by hopping along the coast in the same boat that brought you over. Crime is not a significant concern, but reef, mud, and tropical sun are the real hazards; go slowly and stay hydrated.

Japanese WWII Sites (Land-Based)

Tonoas is the best island in the lagoon for above-water war history. Specific named relics and their exact condition change over the years as the jungle advances, so treat the following as categories to ask your guide about rather than a fixed checklist:

• Coastal defence guns — several large Japanese naval and anti-aircraft guns remain emplaced on the island's ridges and shoreline, some still trained out over the lagoon. They are among the most photographed land relics in Chuuk.
• Bunkers, tunnels, and command structures — concrete bunkers, ammunition stores, and hillside tunnels survive from the island's role as the Combined Fleet's lagoon headquarters.
• The old Japanese town site (Dublon Town) — foundations, cisterns, steps, and scattered industrial debris mark where the pre-war Japanese administrative town once stood. Little is intact, but a knowledgeable guide can reconstruct the layout for you.
• Seaplane and naval base remnants — slipways, ramps, and harbour structures along the shore recall the seaplane operations once based here.

Village & Natural

• Tonoas villages — pastel churches, stilt and concrete houses, and breadfruit-shaded lanes give a vivid picture of contemporary Chuukese island life, far from Weno's bustle.

• Lagoon viewpoints — the climbs to the gun positions reward you with sweeping views over Chuuk Lagoon and its scattered islands.

• Guided WWII land tour — the headline activity: a half- or full-day walk with a local guide through the guns, bunkers, and tunnels of the former Japanese headquarters island. Pair it with the lagoon's underwater wrecks for a complete picture of Operation Hailstone.

• Wreck diving from Tonoas waters — several of Chuuk Lagoon's celebrated shipwrecks lie in the channels around Tonoas; dive operators based on Weno run boats through these waters daily during dive season.

• Snorkelling — the shallow reefs and lagoon flats off Tonoas hold coral and reef fish; bring your own gear, as none is rented on the island.

• Village visits & cultural exchange — with your guide's introduction, meeting families, watching weaving or canoe work, and learning a little Chuukese is a highlight for many.

There are no restaurants on Tonoas. Most visitors bring a packed lunch and water from Weno, or arrange in advance for a local family to prepare a simple island meal — typically reef fish, breadfruit, taro, rice, and tropical fruit. Chuukese food centres on fish, breadfruit, taro, banana, coconut, and pork, often cooked simply or in an earth oven for special occasions. If you arrange a meal through your guide, agree the price beforehand.

There is no bar, café, or nightlife on Tonoas. Note that Chuuk State has historically enforced strict alcohol restrictions, including periods of outright prohibition — do not assume alcohol is available or even legal, and check the current rules before bringing any. The safest and best local drink is fresh young coconut (nu), often offered by villagers. Bring bottled water for the day; tap and well water on the island should not be considered safe for visitors to drink untreated.

There is no tourist accommodation on Tonoas — no hotels, guesthouses, or formal homestays. Visitors stay on Weno, the state capital, and visit Tonoas as a day trip. Weno's options include:

Budget

• Small local guesthouses and inns in Weno with fan or AC rooms.

Mid-range

• Truk Stop Hotel (Weno) — the best-known visitor hotel, with its own dive operation and waterfront restaurant.

Upscale

• Blue Lagoon Resort (Weno) — set in gardens on the old Japanese seaplane-base grounds; the most resort-like property in Chuuk, with a dive centre.

If you wish to overnight closer to Tonoas, the Odyssey and other liveaboard dive vessels that work Chuuk Lagoon spend nights at anchor among the islands — an option for dedicated divers.

There is essentially no shopping on Tonoas — no markets, no craft stalls, and only the most basic village stores selling tinned goods and snacks. Bring whatever you need (water, food, cash in small USD bills) over from Weno. If you wish to support the community, a fair tip to your guide and the customary landowner-access fees for the war sites are the most appropriate way to do so. Bargaining is not part of the culture here.

• Weno (~15–20 minutes by boat) — Chuuk's state capital and transport hub; hotels, dive shops, the airport, the Xavier High School fortress (a former Japanese communications bunker), and Japanese-era relics of its own.
• Fefan (short boat hop) — a lush, traditional lagoon island known for its agriculture, hillside villages, and additional WWII remains.
• Eten (Etten) Island (very close to Tonoas) — a small island that was a major Japanese airfield; its flattened runway area and revetments are still visible.
• Tol / Faichuk (across the lagoon) — the western islands of Chuuk, the most rural part of the state, with mountains, waterfalls, and outer-island culture.
• Chuuk Lagoon dive sites — the Fujikawa Maru, Shinkoku Maru, San Francisco Maru, and dozens of other wrecks lie scattered across the lagoon, reachable by boat from Weno — the world's premier wreck-diving destination.
• Pohnpei (PNI) (~45 minutes by air) — the next stop west on the Island Hopper; home to the Nan Madol stone city and lush rainforest.