Yes, Kaminarimon is completely free to visit with no admission fees. The gate is accessible 24 hours a day, year-round. However, the best experience is during daylight hours for clear photography, or in the evening when the gate is beautifully illuminated and crowds are typically smaller.
The name Kaminarimon literally translates to "Thunder Gate" from the two Japanese characters (雷門) written on the front of the giant red lantern. The gate is flanked by statues of two Shinto deities - Fujin (the Wind God) on the right and Raijin (the Thunder God) on the left. The original name was actually Fujin Raijinmon Gate, but it was naturally shortened to Kaminarimon over time.
The best times to visit are early morning or late afternoon to avoid the largest crowds. Midday and weekends tend to be extremely busy since this is one of Tokyo's most popular tourist destinations, attracting millions of visitors annually. Evening visits offer the advantage of beautiful illumination and fewer tourists for photography.
The current gate was built in 1960, though the original Kaminarimon dates back to 941 AD when it was constructed by military commander Taira no Kinmasa. The gate has been destroyed and rebuilt multiple times throughout history, with the previous structure being destroyed by fire in 1865. The present gate stands 11.7 meters tall and 11.4 meters wide.
After passing through Kaminarimon, you'll enter the famous Nakamise Shopping Street, a bustling 250-meter pedestrian street lined with traditional shops selling souvenirs, snacks, and crafts. This leads directly to Sensoji Temple, Tokyo's oldest Buddhist temple established in 628 AD. You can also explore the surrounding Asakusa district, experience traditional rickshaw rides, or visit during festivals like the famous Sanja Matsuri in May.