SuihoEn – The Japanese Garden

A Garden Built on Reclaimed Water

Walk through the security gate at the Tillman Water Reclamation Plant and you enter a world that shouldn’t exist here. Waterfalls cascade into clear ponds. Koi glide beneath arched bridges. Manicured pines frame every view. The San Fernando Valley heat and traffic noise fade as you step onto carefully raked gravel paths.

The garden’s water source makes it remarkable. Every drop flowing through these 6.5 acres comes from wastewater treatment happening just beyond the bamboo hedge. The Donald C. Tillman plant processes most of the Valley’s sewage, producing 26 million gallons of clean water daily. Instead of sending it all downstream, engineers in the early 1980s created this garden to demonstrate what reclaimed water could support. Dr. Koichi Kawana, who designed major Japanese gardens from Denver to St. Louis, took on the challenge of building an authentic landscape in an industrial setting.

Three Gardens, Three Traditions

You start in the karesansui—the dry meditation garden. White gravel raked into patterns represents water. Large rocks arranged in groups of three symbolize Buddha. A grass-covered mound rises from the stones, representing Tortoise Island, a symbol of longevity in Japanese culture. Wisteria vines drape over an arbor at the path’s end, blooming purple in spring.

The path leads into the wet strolling garden, where 200-year-old design principles meet Valley geography. Water appears everywhere: streams trickling over stones, waterfalls dropping into pools, a large lake reflecting sky and trees. This chisen-style section mimics the sprawling estates built for Japanese feudal lords in the 18th and 19th centuries. You cross three types of bridges—low fording bridges that barely clear the water, transition bridges that move you between garden sections, and high viewing bridges that frame specific scenes.

Stone lanterns mark important spots throughout. Four different styles appear: yukimi-dōrō for snow viewing, kasuga from shrine traditions, nuresagi resembling wet herons, and daikoku representing prosperity. Artisans in Japan carved these lanterns by hand before shipping them to California. Each one sits exactly where Kawana intended, creating rhythm as you walk.

The final section contains the tea garden and Shoin building. A bamboo fence encloses the roji, or “dewy path,” where stepping stones lead to a low water basin. Traditional tea ceremony requires purification before entering the teahouse, so guests rinse their hands at this spot. The Shoin building represents the type of dwelling that housed aristocrats and upper-class monks in medieval Japan. Inside sits a 4.5-tatami-mat teahouse where volunteers host complimentary tea service on the second and fourth Sunday of each month.

What You’ll See

Koi swim in every major pond, their orange, white, and black patterns visible from the bridges. Great egrets stalk the shallows. Ducks paddle near the edges. Turtles sun themselves on rocks. Cherry trees bloom pink in late winter. Irises edge the water in spring. Lotus pads spread across the lake in summer, their white blooms rising above the surface.

The walk takes about 30 minutes at a relaxed pace. More if you stop to photograph or sit on the benches placed at scenic points. The garden closes between noon and 1pm for lunch, and visitors must leave by 3:30pm. Rain shuts down operations for 24 hours—the paths get slippery and the garden needs maintenance time.

The Practical Side

Free admission currently applies, though the reservation system may return. Free parking fills the lot next to the security gate. You check in twice: once at the gate, once at the admission office where staff provide a map. Groups over 10 need to call ahead to check capacity. The garden closes Friday through Sunday, on all Los Angeles city holidays, and any time rain falls within 24 hours.

Construction runs through March 2026, creating partial pathway obstructions and sporadic full closures. The gift shop and teahouse sometimes close for extended periods. The water reclamation plant occasionally produces odors—some visitors report sewage smells, others notice nothing. Planes from Van Nuys Airport pass overhead regularly since the flight path runs nearby. These aren’t dealbreakers, but they break the illusion of being transported to Japan.

Why It Works

Star Trek fans recognize this garden immediately. The Next Generation filmed here repeatedly, using the Shoin building and lake views as Starfleet Academy. The modernist plant architecture even appears in episodes, creating a future-meets-tradition aesthetic that worked for science fiction and works for visitors seeking calm in an industrial area.

What makes SuihoEn work is honesty. It doesn’t pretend to be in Kyoto. The recycled water aspect is front and center—plaques explain the system, tours discuss the engineering. Kawana designed with this context in mind, choosing drought-tolerant plants suited to Southern California while maintaining Japanese proportions and symbolism. The result respects both traditions: water conservation and garden craft.

You leave through the same security gate, passing the plant’s tanks and pipes. The contrast doesn’t diminish the garden. If anything, it reinforces what you just experienced—beauty and function occupying the same space, neither compromising the other.