Awaji Island: Tadao Ando's Architecture, Island Flower Fields, the Birthplace Shrine of Japan & the Naruto Whirlpools — 2 Days

Before reaching the island you can walk out over the water beneath the Akashi Kaikyo Bridge, for years the longest suspension bridge in the world at nearly four kilometres, its central span an engineering record. The Maiko Marine Promenade is a glass-floored observation walkway built into the bridge's understructure on the Kobe shore, 47 metres above the Akashi Strait, where you look straight down through the floor to the tide racing below and out along the vast cables and towers. It is a thrilling, vertiginous way to appreciate the scale of the crossing that links Hyogo to Awaji, and a natural first stop before driving onto the island.

Admission about ¥250-300 (approx., 2025); roughly 09:00-18:00, may close in high wind. On the Kobe/Tarumi shore at Maiko, just before the bridge. Allow about 50 minutes.

Awaji Yumebutai is the architect Tadao Ando's vast cultural and garden complex on a hillside that had been stripped bare to quarry earth for Kobe's airport island — a project of restoration as much as building, replanting the scar with a million trees and threading it with Ando's signature board-marked concrete, long stairways, channels of water and shell-paved courts. Walking through it you move between shaded colonnades, reflecting pools that mirror the sky, an open-air theatre and a glasshouse of greenery, with the Inland Sea opening out below. It is one of the most ambitious works of landscape architecture in Japan and the centrepiece of a northern-Awaji day.

Grounds free to walk; the Kiseki-no-Hoshi greenhouse about ¥600 (approx., 2026), roughly 10:00-18:00. Beside the Grand Nikko resort. Allow about 90 minutes.

The most striking part of Yumebutai is the Hyakudanen, a 'hundred-stepped garden' climbing the hillside as a grid of one hundred small square flower beds stacked up the slope in terraces, each planted with chrysanthemums and seasonal blooms and divided by Ando's concrete walls and water runnels. Conceived as a memorial to the lives lost in the 1995 Great Hanshin Earthquake that devastated this region, it is meant to be climbed slowly, the geometry opening to a wide view of the Inland Sea from the top. Standing among the stepped beds with the water threading down through them is the signature image of the whole complex, and a quietly moving pause.

Free, part of the Yumebutai grounds; roughly always accessible in daylight. On the upper terraces of the complex. Allow about 40 minutes.

On the high ground of northern Awaji, Hanasajiki is a public flower park where broad fields of seasonal blooms tilt down toward the sea — rape blossom and poppies in spring, salvia and cosmos in autumn, a sweep of colour set against the blue of Osaka Bay. There are no buildings to speak of, just the open hillside, walking paths and the framed sea view, and it is free to enter, making it one of the most relaxed and photogenic stops on the island. What is in flower depends entirely on the month, so it rewards checking the current bloom, but the combination of colour and sea-horizon is reliably lovely in any season it is open.

Free entry, parking about ¥200 (approx., 2025); roughly 09:00-17:00. Blooms rotate by season — check what is flowering. North of Yumebutai by car. Allow about 60 minutes.

Grand Nikko Awaji is the large resort hotel built into Tadao Ando's Yumebutai complex, its rooms looking out over the architect's terraced gardens and the Inland Sea, with hot-spring baths, several restaurants and direct access to the concrete-and-water landscapes you have just walked. It is an upper-upscale resort rather than an ultra-luxury hideaway, but its setting inside one of Ando's major works and above the bay makes it the natural and atmospheric place to stay on the island. (Note for older guidebooks: this hotel was the Westin Awaji until 2020 and should not be referred to by the former name.) Arriving in the late afternoon leaves time for the baths and a sea-view dinner.

An upper-upscale resort; rates from about ¥18,000 per night vary by room and season (approx., 2025). Inside the Yumebutai complex. The day's final stop and overnight.

Izanagi Jingu, set among old camphor trees in the centre of the island, is one of the oldest shrines in Japan, enshrining Izanagi, the male creator deity who, with Izanami, is said in the Kojiki chronicle to have given birth to the islands of Japan — beginning with Awaji itself. By tradition it stands on the site where Izanagi retired, and a vast 900-year-old sacred camphor, its trunk a tangle of merged trees, presides over the precinct as a symbol of marital and family harmony. Quiet, deeply rooted and rarely crowded with foreign visitors, it grounds the island's bright modern architecture in the myth that makes Awaji the first land of Japan.

Free entry; precinct open during daylight hours. Central Awaji, about 20 minutes south of Yumebutai by car. Allow about 50 minutes.

At the southern tip of Awaji, the narrow Naruto Strait between the island and Shikoku funnels the enormous tidal flow between the Inland Sea and the Pacific, and where the fast and slow water meet it spins into whirlpools that can reach twenty metres across — among the largest tidal vortices in the world. From Fukura port a cruise boat runs out under the great Onaruto Bridge to circle the churning water at close range, the swirls forming and collapsing beneath the hull. Because the vortices are driven by the tide they peak around the daily spring tides and fade at slack water, so the experience depends entirely on timing the sailing to the tide table, strongest around new and full moons.

Cruise from about ¥3,000 adult (approx., 2025); roughly 60 minutes, several daily sailings from Fukura port timed to the tide — check the operator's tide schedule to pick a strong-tide departure. Best in spring and autumn. Allow about 90 minutes including boarding.

Awaji is famous across Japan for its sweet onions, grown in the island's mild climate and prized for a sugar-rich, mellow flavour, and for its own Awaji beef. The Awajishima Onion Kitchen, at the Fukura port complex beside the cruise terminal, brings the two together in an award-winning burger — a thick patty of Awaji beef under a heap of slow-cooked sweet onions — that has become one of the island's signature casual meals. Eating it at the harbour right after the whirlpool cruise is an easy, very local lunch, and the surrounding michi-no-eki market is a good place to pick up the onions, onion dressing and other island products to take home.

Burgers from about ¥600-1,000 (approx., 2025); at the Fukura port michi-no-eki beside the cruise dock, can queue at peak lunch. Allow about 45 minutes.