A beam of morning light piercing through a quiet forest—this fleeting moment, where the light reflects on the water’s surface and forms a heart shape, creates a mystical scene known as Kameiwa Cave in Kimitsu City, Chiba Prefecture. This natural phenomenon, which appears around the spring and autumn equinox, has become a popular destination among photography enthusiasts and international visitors.
This article introduces everything you need to visit with confidence, including how to get there, when to see the heart-shaped light, and practical Q&A to make your trip smooth and enjoyable. Whether you’re traveling solo or for the first time, you’ll find this guide easy to follow.
Why not see this viral SNS spot for yourself? Let us walk you through a travel experience truly worth the visit.
Contents
Kameiwa Cave Access Guide for First-Time Visitors
Check the latest weather forecast before your visit: [weathernews ]
By Train
Tokyo Station
Take the JR Limited Express “Sazanami” train to Kimitsu Station (approx. 1 hr 10 min)
From Kimitsu Station, take the Nitto Kotsu bus and get off at “Shimizu Keiryū Hiroba-mae” (approx. 40 min)
Walk about 5 minutes from the bus stop to Kameiwa Cave
Total travel time: approx. 2 hours
Chiba Station
Take the JR Uchibō Line Rapid to Kimitsu Station (approx. 40 min)
From Kimitsu Station, take the Nitto Kotsu bus and get off at “Shimizu Keiryū Hiroba-mae” (approx. 40 min)
Walk about 5 minutes from the bus stop to Kameiwa Cave
Total travel time: approx. 1 hr 30 min
Kisarazu Station
Take the JR Uchibō Line to Kimitsu Station (approx. 15 min)
From Kimitsu Station, take the Nitto Kotsu bus and get off at “Shimizu Keiryū Hiroba-mae” (approx. 40 min)
Walk about 5 minutes from the bus stop to Kameiwa Cave
Total travel time: approx. 1 hr 10 min
One Point Advice
Visitor Information: Hours, Admission & Access
Admission: Free
Hours: Open all day (no entry restrictions)
Closed: Open year-round (natural site)
Official Travel Guide: https://maruchiba.jp/
Kameiwa Cave Highlights & Half-Day Plan
Heart-Shaped Light｜Kameiwa Cave Viewpoint
Around the spring and autumn equinox , morning light shines through the cave’s ceiling and reflects onto the water surface, forming a heart-shaped glow . Visitors from around the world come to Kameiwa Cave to witness this magical scene. Though the cave itself is small, the perfect balance of light, water, and stone creates a moment of natural artistry. Early morning visits are best, and with luck, you’ll see a flawless heart-shaped reflection.
Time Required: 20–30 minutes
Admission: Free
Shimizu Stream Park｜Riverside Walking Trail
The cave is part of the broader Shimizu Stream Park in Kimitsu, where wooden paths and stone-paved trails line the riverbank. Walking here to the sounds of flowing water, you might spot river fish or birds, or rest on a bench in the shade. Seasonal flowers and fresh greenery make this an ideal spot for gentle strolling and relaxation—perfect for families and seniors alike.
Time Required: 30–40 minutes
Admission: Free
Bell of Good Fortune｜Wish-Making Spot
Located within Shimizu Stream Park, the “Bell of Good Fortune ” is a place where visitors can ring the bell with a single wish in mind. Though simple in appearance, the clear tone resonates through the surrounding forest and adds a peaceful memory to your trip. Couples and families often stop here to mark their visit.
Time Required: 5–10 minutes
Admission: Free
Nearby Spots for Same Day & Next Day Trips
Nomizo Waterfall｜Scenic Spot Near Kameiwa
Just next to Kameiwa Cave lies Nomizo Waterfall, one of the most popular sights in Shimizu Stream Park. Water flows gently between mossy rocks, creating a soft and dreamy atmosphere. Located less than a 5-minute walk from Kameiwa Cave, it’s a must-see paired spot where you can enjoy two mesmerizing water scenes in one visit.
Yōrō Valley Onsen｜Day Trip to Nature Hot Springs
A 50-minute train ride from Kameiwa Cave via the Kominato Railway takes you to Yōrō Valley , home to riverside hot springs tucked deep in nature. Many outdoor baths offer views of waterfalls or ravines, making this a perfect destination to soothe your body and mind. The local train ride itself is a relaxing part of the journey.
Nokogiriyama｜Tokyo Bay View from Cliffside
For your second day, we recommend a trip to Nokogiriyama ｜Cliffside Viewpoint of Tokyo Bay, a dramatic peak in the Uchibō area. Ride the ropeway or climb the stairs to reach the summit, where panoramic views of Tokyo Bay await. The iconic “Hell’s Lookout” platform juts out over a cliff, offering a thrilling experience. It takes about 90 minutes by train and bus from Kimitsu—well worth the detour for dynamic scenery.
Kameiwa Cave Q&A｜Tips for First-Time Travelers
When can I see the heart-shaped light?
Around the spring and autumn equinox, around 7:00 a.m. on sunny mornings is the best time.
How much time should I plan for visiting?
Around 30–40 minutes, including photography and walking through the area.
What should I wear for the walk?
Comfortable shoes and flexible clothing are recommended, as riverside paths can be slippery.
When is the least crowded time to visit?
Weekday mornings at Kameiwa Cave tend to be quieter and more relaxed.
Is it suitable for kids or elderly visitors?
Yes, as long as you take your time—there are wooden paths and some uneven terrain.
Kameiwa Cave Travel Summary & Next Steps
Kameiwa Cave, quietly nestled in the hills of Kimitsu, Chiba Prefecture , offers a one-of-a-kind experience of light and water artistry created by nature. The moment you see the heart-shaped reflection, you’ll understand its charm.
With clear access tips and visit timing guidance, even first-time visitors can enjoy the site with ease. Combined with a scenic walk and nearby attractions, it’s a fulfilling half-day trip.
Next, why not head further into the Bōsō Peninsula to discover the scenic wonders of Yōrō Valley or soak in the peaceful hot springs of Nomizo? Your journey to nature continues.
