Initial D Irohazaka

Irohazaka (いろは坂) is a pair of winding roads that connect the lower elevations near centralNikko to the higher elevations of the mountainous Okunikko region. "Iroha" are the first three of 48 syllables of the formerly used Japanese alphabet (which is now known as "aiueo"), and "zaka" means "slope" - the Irohazaka Winding Roads were so named because together they consist of 48 hairpin turns.

The two roads were respectively built in 1954 and 1965 as some of Japan's first toll roads, but were later turned toll free. Today, the older road is only open to downward traffic and includes a pit stop from where you can see two waterfalls. The newer road, meanwhile, is only open to upward traffic as far as the Akechidaira Plateau near the top of the road. The plateau offers an observation deck with views over the Irohazaka and the valley below.

Spectacular autumn colors along Irohazaka can usually be enjoyed from late October to early November. Due to the autumnal popularity of Nikko, traffic can get very bad along the Irohazaka, causing delays to both cars and buses. Visitors are advised to avoid weekends and national holidays and to try to go as early as possible.



Each corner has a letter of ancient Japanese alphabet, and you will see it in alphabetical order. The alphabetical order starts from I-ro-ha, while modern alphabet starts from a-i-u. This road used to be for ascetics in the past. Iroha-Zaka ascends more than 1,300 feet (396 m). This road plays a significant role in Japanese history: The route was popular with Buddhist pilgrims on their way to Lake Chuzenji, which is at the top of the forested hill that this road climbs.



"Iroha" are the first three of 48 syllables of the formerly used Japanese alphabet (which is now known as "aiueo"), and "zaka" means "slope" - the Irohazaka Winding Roads were so named because together they consist of 48 hairpin turns. The road's winding design, providing stunning panoramic views, is very curvy and fun for a leisurely ride, so it pays to take it slow. Exercise extreme caution when passing on-coming traffic, over-taking and around corners. Drive with your headlights on at all times as it is easier for oncoming vehicles to see you.



Today, the older road is only open to downward traffic and includes a pit stop from where you can see two waterfalls. The newer road, meanwhile, is only open to upward traffic as far as the Akechidaira Plateau near the top of the road. People started calling the slope Iroha-zaka in the early Showa era. Ancient Japanese alphabet consisted of 48 letters, and the number of curve is 48. Therefore, tourist guides started calling the slope Iroha-zaka. Today, the number of curve is 30 because the road was improved in 1954.The two roads were respectively built in 1954 and 1965 as some of Japan's first toll roads, but were later turned toll free.