This Monday is one ofIt will be a national holidays in Japan. next Monday.

Next Monday is a national holiday in Japan.

It is a day for celebrating new adults.people entering adulthood.

Young people turning 20 years old wear traditional Japanese clothes, 振袖 (Fu-ri-so-de) for women or 袴(Ha-ka-ma) for men.

Celebration events are held by individual cities with uniqueIndividual cities hold celebrations, each having their their own customs.

For example, Mickey Mouse is introduced topart of the ceremony in Urayasu city, at which Tokyois where Disney Land Tokyo is located.

This Monday is one of the national holidays in Japan.

Young people turning 20 years old wear traditional Japanese clothes, 振袖 (Fu-ri-so-de) for women or 袴(Ha-ka-ma) for men.

"cloths" are like 布巾 etc. "clothes" are things you wear.

Celebrationory events are held by individual cities with unique customs.

Celebratory is the adjective of celebration. You could describe something as "the XYZ Celebration Event" as the title or whatever, but you wouldn't use "Celebration event" as a noun in regular speech.

For example, Micky Mouse is introduced to the ceremony in Urayasu city, at which(the city of Urayasu / Urayasu City / Urayasu), where Tokyo Disney Land is located.

When "city" is part of the place name, it gets capitalised just like the rest of the name. If it's not part of the place name, it usually gets omitted, or moved to the front like "the city of Urayasu"

Young people atin Kitakyushu city celebrate the day by dressing up in flashy costumes.

This Monday is one of the national holidays in Japan.

Young people turning 20 years old wear traditional Japanese clothsing, 振袖 (Fu-ri-so-de) for women or 袴(Ha-ka-ma) for men.

You can say "20 years old" but I feel it's more natural to just say "20"

Celebrations/Celebratory events are held by individualdifferent cities with unique customs.

For example, Micky Mouse iwas introduced to the ceremony in Urayasu city, at which Tokyo Disney Land is located.