[Answer] 10. This is Japan's third-largest city and is where its famous namesake castle, once one of Japan's largest, has been located since 1586. The city is at the mouth of the Yodo River and is one of Japan's commercial and industrial hubs.

Step 1 : Introduction to the question "10. This is Japan's third-largest city and is where its famous namesake castle, once one of Japan's largest, has been located since 1586. The city is at the mouth of the Yodo River and is one of Japan's commercial and industrial hubs."

...1. Akita 2. Otsu 3. Morioka 4. Osaka Osaka Castle was built in 1586 by Toyotomi Hideyoshi, but what visitors see today is a copy of the original because the original has been destroyed. The Castle is great for views of Osaka. Yokohama is the second largest city.

Step 2 : Answer to the question "10. This is Japan's third-largest city and is where its famous namesake castle, once one of Japan's largest, has been located since 1586. The city is at the mouth of the Yodo River and is one of Japan's commercial and industrial hubs."

Osaka:

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