Shishitsuka Ōike Pond (Shishitsuka Big Pond)

Good to know

• Park
• 4 kmfrom Tsuchiura center
• 4.1 / 572 reviews
• Tsuchiura

An ancient pond at the heart of a living countryside

Shishitsuka Ōike began life long before the Edo period (1603–1868), dug as an irrigation reservoir to water the paddies below the ridge. The pond is the beating centre of roughly 100 hectares of satoyama—180 hectares if you include the adjoining Yoshise area in neighbouring Tsukuba—a patchwork of valley-bottom rice fields (yazu-da), streams, woodland, wetland and farmland that has been maintained by human hands for centuries.↗↗

That blend of nature and traditional farming has earned the area an impressive roll-call of recognition: it is listed among Japan's 'One Hundred Selected Ponds' by the Ministry of Agriculture, is named by the Ministry of the Environment as a satoyama of high importance for biodiversity, and serves as a core site for the national 'Monitoring 1000' countryside survey; it was also featured as a UNESCO Future Heritage project and among Ibaraki's hundred best fields for children's nature experience.↗↗

History runs deep here too. Jomon-period shell mounds and settlement sites scatter the higher ground behind the pond, most notably the nationally designated Jōkōzuka Shell Mound, so the landscape reads as a record of people and nature shaping each other over thousands of years.↗

A raptor-rich stage for birdwatching

For birders, Shishitsuka Ōike is one of Ibaraki's signature sites. Some 147 species have been recorded across the woodland and wetland, with around 90 visible over the course of a year, and because the area sits on a migration route, vagrants and rarities turn up regularly enough to keep local eyes peeled.↗

The skies above the valley belong to the raptors. Osprey, black kite, northern goshawk, hen harrier, kestrel and owl all patrol the area, and the eastern buzzard (sashiba) returns each year to nest in the surrounding woods. In winter the pond fills with diving and dabbling ducks—occasionally unusual ones—and watching a goshawk stoop across the water to hunt them is one of the site's small dramas.↗

It is not just birds. The mosaic of ponds, reed beds and meadows supports mammals, insects and plants that change face with every season, and a number of the species recorded here are listed as endangered or near-threatened within Ibaraki Prefecture.↗↗

Walking the loop with the Saturday observers

The most rewarding way to experience Shishitsuka is to join its long-running Saturday morning nature walks, run by the certified NPO Shishitsuka Nature and History Society, which has been caring for and interpreting this countryside since 1989. Fondly nicknamed the 'Shera Cup Club', the outings are free, need no reservation and welcome anyone; they go out roughly 52 times a year, in heat, cold and rain alike, pausing only for the New Year and serious storms.↗↗

The gentle guided loop covers about 3.5 kilometres over roughly three hours, moving from the pond dike out through woodland, wetland and rice fields, with the focus shifting with the season—plants such as rare wildflowers in spring, butterflies and insects in summer, migrating raptors and wintering waterbirds in colder months. Walking the same paths week after week lets you watch the year turn, which is part of the site's quiet charm.↗↗

If you prefer to explore on your own, the society maintains a printed satoyama walking map—the numbers take you round the circuit in order, and copies are left in a box on the pond dike as well as online for you to download and print. The observation loop is about 3 km; it starts on paved road but most of it is dirt track through the trees and past the wetland, so expect a little rise and fall underfoot.↗↗

Beyond walks, the society and partners such as the Kasumigaura Environmental Science Center stage seasonal plant, bird and insect observation events and habitat-management activities here, often aimed at families and children.↗↗

Good to know before you go

Dress for the paths rather than the postcard: this is damp woodland and wetland edge, so sturdy shoes or light hiking boots are best, rubber boots after rain, and in summer long sleeves and a hat are practically essential against the insects. Toilets and a parking area are provided, and entry to the satoyama is free, but the area is essentially open countryside with no facilities beyond a single restored farmhouse, so bring water and come prepared.↗↗

A note of courtesy matters here: much of the satoyama is private land still worked by local residents, so stay on the marked observation paths and out of the fields. The very reason the wildlife thrives is that the farming continues quietly around you.↗↗

By public transport, take the bus from Tsukuba Station (TX line) toward Tsuchiura, or from JR Tsuchiura Station's west exit toward the University of Tsukuba, and alight at the Shishitsuka bus stop, about a five-minute walk away; if you drive, use the on-site parking. The pond and satoyama are open around the clock with no closing days, and the Saturday walks typically gather in the morning, roughly 9 am to noon.↗↗

If you want to deepen the historical thread, the nearby Jōkōzuka Shell Mound and its local history plaza with reconstructed dwellings make a fitting companion visit—though it is worth checking current opening status before you plan around it.↗