One line north, no backtracking: in at Fukushima, out from Shin-Aomori.
Aizu-Wakamatsu for Tsuruga-jo and Iimori Hill, plus a day out to Ouchi-juku or the Bandai Plateau. Aizu is about 2h30–3h from Tokyo, changing at Koriyama.
🚄1h10Yamagata Shinkansen, Fukushima → Yamagata · from Aizu, add about 1h30 via KoriyamaZao for the snow monsters in winter or the Okama crater lake in summer. Add a night at Ginzan Onsen if you can.
🚃1h15JR Senzan Line, Yamagata → Sendai · get off at Yamadera on the way, about 20 min outSendai for gyutan and the Date clan sites, and a half day at Matsushima Bay, about 40 min by train.
🚄40 minTohoku Shinkansen, Sendai → Morioka · stop at Ichinoseki, about 30 min, for HiraizumiHiraizumi for Chuson-ji [UNESCO] and Motsu-ji, the Geibikei boat ride, then wanko soba in Morioka.
🚄1h30Akita Shinkansen Komachi, Morioka → Akita · it stops at Tazawako and KakunodateLake Tazawa and Kakunodate on the way in, a night at Nyuto Onsen, and the Oga Peninsula for the Namahage.
🚃2h45Limited express Tsugaru, Akita → Aomori via Hirosaki · only a few trains a dayHirosaki Castle, the Nebuta Museum Wa Rasse, and a day at Oirase Gorge and Lake Towada.
🚄HomeTohoku Shinkansen, Shin-Aomori → Tokyo · about 3h10
Only have 7 days? Stay on the Shinkansen: Sendai and Matsushima, Hiraizumi, Kakunodate and Lake Tazawa, then Hirosaki and Aomori. Yamadera works as a day trip from Sendai.
Times are typical. The JR East Pass (Tohoku area) covers every train on this route. Check timetables before you book, especially the Tsugaru.
Tohoku's big summer festivals all fall in the first eight days of August. Morioka's Sansa Odori starts it (Aug 1–4), then Aomori's Nebuta (Aug 2–7), Akita's Kanto (Aug 3–6), Yamagata's Hanagasa (Aug 5–7) and Sendai's Tanabata (Aug 6–8). By Shinkansen you can see several in one trip.

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Matsushima BayMatsushima BayOne of the Three Views of Japan: about 260 pine-covered islands in a shallow bay. The sightseeing cruise from Matsushima pier loops through them in about 50 minutes; Godaido hall and the red Fukuura-jima bridge are a short walk from the pier.Take the sightseeing cruise through the pine islands.📍 Google Maps
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Zuigan-jiZuigan-jiDate Masamune rebuilt this Zen temple and its main hall was finished in 1609; it is a National Treasure. The caves cut into the cliffs along the approach were used for memorial services and burials in the Edo period.Date Masamune's Zen temple, finished in 1609, with Edo-period memorial caves along the approach.📍 Google Maps
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ZuihodenZuihodenMausoleum of Date Masamune, the lord who founded Sendai, built in 1637. It was destroyed in a 1945 air raid and rebuilt in 1979 in its original black lacquer, gold and bright colours.Date Masamune's gold-and-lacquer mausoleum in a cedar forest.📍 Google Maps
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Sendai Tanabata FestivalSendai Tanabata FestivalHeld August 6–8 every year, with fireworks the evening before. Thousands of streamers, many several metres long, hang along the Ichibancho and Chuo shopping arcades.August 6–8: giant paper streamers fill the Ichibancho arcades.📍 Google Maps
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Sakunami OnsenSakunami OnsenHot spring village in the hills west of Sendai, under an hour by train on the JR Senzan Line. Next door, Nikka's Miyagikyo distillery, opened in 1969, runs tours.Quiet riverside hot springs, next to Nikka's Miyagikyo whisky distillery.📍 Google Maps
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Gyutan-doriGyutan-doriSendai's grilled beef tongue dates back to a local restaurant in 1948. Gyutan-dori is a row of gyutan restaurants on the third floor of Sendai Station; it usually comes with barley rice and oxtail soup.Sendai Station's alley of grilled beef-tongue restaurants.📍 Google Maps

Zao Snow Monsters (📍google maps) — wind-driven ice coats the trees until each becomes a hunched white figure in the fog. The Zao Ropeway carries you up to them, best from mid-January to late February. Yamadera temple: about 1,000 stone steps; Matsuo Basho walked here in 1689 and wrote one of his most famous haiku. Yamagata grows more cherries than any other prefecture.
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Ginzan OnsenTaisho-era inns along a river, gas lamps at dusk. Often linked to Spirited Away.📍 Google Maps

Konjiki-do (📍google maps) at Chuson-ji [UNESCO] — built in 1124, gold leaf and lacquer on every surface, holding the mummified remains of three Fujiwara lords and the head of a fourth. Geibikei Gorge: a flat-bottomed boat between 50-metre limestone cliffs, the boatman singing a folk song on the way back. In Morioka, wanko soba is refilled after every bite until you put the lid down.
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Chuson-ji & Konjiki-do [UNESCO]Hilltop temple complex; the 1124 gold hall is the highlight.📍 Google Maps
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Tono Furusato VillageThatched farmhouses in the valley of Japan's folk tales, far from the crowds.📍 Google Maps

Namahage [UNESCO] (📍google maps) — on New Year's Eve, men in demon masks visit Oga Peninsula homes asking whether lazy children live inside. The ritual has been recorded since at least 1811. Nyuto Onsen: seven inns in old-growth beech forest, each with its own springs, from milky-white sulphur to clear. Lake Tazawa runs a blue between turquoise and cobalt that doesn't reproduce in photographs.

Nebuta Festival (📍google maps) runs August 2–7 — illuminated warrior floats around five metres tall, and millions of visitors over the week. Then Hirosaki, about 45 minutes away by train: 2,600 cherry trees around the castle moat, fallen petals covering the moat as the blossoms fall in late April. Plan for one, come back for the other.
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Aomori Nebuta FestivalAugust 2–7. Or see the real floats year-round at Nebuta Museum Wa Rasse.📍 Google Maps
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Shirakami-Sanchi [UNESCO]Virgin beech forest. On its edge, the Twelve Lakes trail leads to the blue Aoike pond.📍 Google Maps

Bandai Plateau (📍google maps) — some 300 lakes and ponds formed by Mt. Bandai's 1888 eruption; on the Goshikinuma trail they run from cobalt to emerald. In Aizu-Wakamatsu in 1868, teenage Byakkotai samurai saw smoke over the town, believed Tsuruga-jo had fallen and took their own lives. The castle was still standing. Their graves on Iimori Hill still draw visitors. Ouchi-juku: a preserved Edo-period post town of thatched inns.
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Iimori Hill & SazaedoByakkotai graves, and a wooden hall built around a double-spiral ramp.📍 Google Maps
