This is the 7198th most frequent Japanese word.
万博
"万博" means "World Exposition" or "World Expo."
Here, the word "万博" refers to a designated world exposition event that is being organized in Osaka in a specific year, emphasizing its occurrence.
2025年に大阪でまた万博が開催されます。
In 2025, another world exposition will be held in Osaka.
This usage of "万博" pertains to the physical location of a world exposition event.
万博会場への交通が便利になっています。
Transportation to the world exposition venue is becoming more convenient.
In this sentence, "万博" is used to refer to the general concept of world expositions as historical events.