[Kanto Touring Road] [Gunma Prefecture] Bike trip to Boso Flower Line! A solo Harley trip to enjoy a scenic road full of blooming flowers

Hello, this is _hiroyuki.ta. This time, I toured by motorcycle from central Tokyo to the Boso Flower Line in Chiba Prefecture. Boso Flower Line is the nickname for the approximately 46km coastline road from Tateyama City to Minamiboso City, and is a scenic road where flowers such as rape blossoms and marigolds bloom in abundance in early spring. This time I would like to introduce its charm.


What is Boso Flower Line?


Boso Flower Line is a nickname for a road that refers to part of Chiba Prefectural Route 257, National Route 410, and Chiba Prefectural Route 297. Of this, the approximately 6km stretch from Ido in Tateyama City to Aihama has been certified as one of Japan’s 100 best roads, and between the coast and the road there is a forest of black pine trees that protects against the strong southwest winds in winter. . Because of the beauty of this pine forest for erosion control and the sandy beach, Heisaura Beach has been selected as one of the “100 Best White Sand and Green Pines”.

As the name suggests, the Boso Flower Line is lined with colorful flowers that decorate the road every season. Especially from January to spring, yellow rapeseed flowers spread all over the area, creating a stunning scenery that contrasts with the blue sea and sky. Marigolds and poppies bloom in the summer, but since rapeseed flowers are the most planted, the best time to see them is from winter to spring.

Route to Boso Flower Line

This time, I rode a motorcycle from central Tokyo to the Boso Flower Line. My favorite car is a Harley-Davidson FLSB Sport Glide. This bike is a multifunctional bike that can be used as both a cruiser and a tourer, and is attractive for its comfortable riding performance and stylish design.

The starting point is Nihonbashi Hakozakicho. From here, take the Shuto Expressway No. 9 Fukagawa Line, then take the Shuto Expressway Wangan Line to the Tokyo Bay Aqua Line. The Tokyo Bay Aqua Line is an expressway consisting of approximately 15 km of undersea tunnels and approximately 5 km of bridges, and connects Kisarazu City, Chiba Prefecture, and Kawasaki City, Kanagawa Prefecture, across Tokyo Bay. In the undersea tunnel, you can experience the feeling of running under water approximately 60m deep, and on the bridge, you can enjoy the view while feeling the sea breeze.

After passing through the Tokyo Bay Aqua Line, enter the Tateyama Expressway at Kisarazu JCT. The Tateyama Expressway is an expressway that runs south through Chiba Prefecture, and there are tourist spots such as Cape Futtsu and Mt. Nokogiriyama along the way. This time I didn’t have much time, so I went straight to Tateyama Bypass. Tateyama Bypass is National Route 127 and is a road that detours around Tateyama City. From here, I took National Route 410 and headed for Prefectural Route 257 in Sano, Tateyama City, which is the entrance to the Boso Flower Line.

Highlights of Boso Flower Line


As soon as you enter the Boso Flower Line, you will immediately see a field of rapeseed flowers. The yellow flowers harmonize with the blue sea and sky, making it look like a painting. There are observation decks and rest areas along the road where you can take photos and take a rest. I was particularly impressed by the view from the observation deck on the Heisaura Coastal Promenade. Running along the coastline, the air is clear and pleasant.

The Boso Flower Line is a road where you can enjoy not only flowers but also history and culture. There are old shrines along the way such as Suzaki Shrine and Awa Shrine. Susaki Shrine is one of the most famous shrines in Boso, and is said to be the shrine where Minamoto no Yoritomo prayed for the safe delivery of his wife Masako Hojo. Awa Shrine is located halfway up Mt. Agaya, and the Awa Natural Village and Tateyama Wild Bird Forest are adjacent to the shrine grounds. Nojimazaki, located at the southernmost tip of the Boso Flower Line, is home to Nojimazaki Lighthouse, Japan’s oldest Western-style lighthouse, and Nojimazaki Park. From Nojimasaki Lighthouse, you can see the Izu Peninsula and the Izu Islands.

At Boso Flower Line, you can also enjoy local specialties. There are roadside stations and direct sales stands along the way, where you can buy fresh seafood, vegetables, fruits, and more.

Boso Flower Line motorcycle parking lot

Boso Flower Line does not have a dedicated parking lot for motorcycles, but there are free parking spaces at observation decks and rest areas. However, please be aware that it can be crowded on weekends and holidays. Paid parking is also available at tourist facilities and restaurants along the route. It is a good idea to check the parking lot fees and business hours in advance.


This time I enjoyed a spring drive on the Boso Flower Line. The Boso Flower Line is a road with a variety of attractions, including flowers, the sea, and history. When you ride a bike, you can feel the wind, smells, and sounds, making it even more enjoyable. It’s close to Tokyo, so it’s recommended as an easy touring course. Please try running the Boso Flower Line at least once.

At the end of the article, we will add the English translation of Boso Flower Line. Boso Flower Line is called Boso Flower Line in English. Boso is a region name referring to the southern part of Chiba Prefecture, where Flower means flower and Line means road. The name Boso Flower Line accurately describes the characteristics of this road.

The above was sent to you by _hiroyuki.ta. Next time we look forward to.