Osaka is the second largest city in Japan and a vibrant and charming tourist destination. If you only have one day to visit Osaka, here is a recommended best route to experience the charm of the city as much as possible.

Morning:

1. Osaka Castle Park
Around 8am, you can go to Osaka Castle Park, which is one of the most famous attractions in Osaka.

. This castle was built in the 16th century and is one of the most representative castles in Japan. You can enjoy the beautiful scenery of the castle here, or visit the museum inside the castle to learn more about Osaka's history and culture.

2. Shopping Streets Around Osaka Castle Park
From Osaka Castle Park, you can stroll along the surrounding shopping streets, where there are many traditional Japanese shops and snack shops that allow you to experience Japan's traditional culture and cuisine.

Noon:
3. Dotonbori
At noon, you can head to the busiest commercial street in Osaka, Dotonbori, where there are many famous restaurants and snack shops that allow you to taste authentic Osaka cuisine, such as Osaka yaki, Zhangyu yaki, etc.
.

4. Shinsaibashi
From Dotonbori, you can walk to the nearby Shinsaibashi, which is one of Osaka's most popular shopping streets with many fashionable shops and boutique stores where you can purchase unique Japanese goods.

Afternoon:
5. Tensho Pavilion
In the afternoon, you can go to Tensho Pavilion, the tallest building in Osaka, where you can overlook the beautiful scenery of the entire city.
. You can also visit museums here to learn more about Osaka's history and culture.

6. New World
From the Tensho Pavilion, you can head to New World, a vibrant and entertaining area with many bars, restaurants, and entertainment venues that allow you to experience Osaka's nightlife.

Evening:
7. Osaka Night View Cruise
In the evening, you can take the Osaka Night View Cruise to enjoy the beautiful scenery of Osaka Castle and surrounding areas.
. This is a very romantic and unforgettable experience that allows you to experience the charm of Osaka at night.

8. Osaka Food Street. This is the best route for a one-day trip to Osaka, and of course there are many other attractions and activities to choose from. Plan your itinerary according to your interests and time, and I believe you will fall in love with this vibrant and charming city.