Sumo is Japan’s national sport. Its origins go back more than 1,500 years, and it rarely leaves Japan. But some competitions are starting to tour - including The Grand Sumo Tournament, which recently happened in London. Wrestlers often start training from a very young age, and training is intense. It involves building strength and fitness - and eating. A lot. They consume around 10,000 calories a day.

The BBC’s Mariko Oi is from Japan. She talks us through all we need to know about the sport. We also hear from 21-year-old Aonishiki Arata. He’s one of Ukraine’s top wrestlers and now lives and trains in Japan. And two fans share why they love the sport.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Mora Morrison and Natalia Makohon Editor: Verity Wilde

The White House, in the heart of Washington DC, has housed American presidents for more than two centuries. But now, the East Wing of the famous complex has been torn down by President Donald Trump.

He says he’s replacing it with a huge ballroom to host events. The administration hasn’t revealed plans for it just yet, but the latest estimated cost its around $300m.

So did President Trump have permission to partially demolish the building? What do people think about it? We speak to BBC reporter Sakshi Venkatraman, all the way from New York. She also explains how President Trump isn’t the only one who has made changes to the presidential residence over the years, but he’s already made a few since moving back in.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Chelsea Coates Producers: Imogen James and Emily Horler Editor: Verity Wilde

In August, China launched a new “K visa”, to attract young science and technology graduates. It came into effect on 1st October 2025 and although there isn’t a lot of information about what the visa will allow people to do, it’s getting a lot of media attention. Many people in China aren’t happy about it. That’s because millions of Chinese graduates can’t find jobs and there are worries over preferential treatment for foreigners.

Mengchen Zhang, from the BBC’s Global China Unit, joins Hannah in the studio to explain what we know about the K visa, why the Chinese government has introduced it and why it’s so hard right now for Chinese grads to find work. We also discuss Chinese work culture, including the new concept of 007.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producer : Julia Ross-Roy Video Journalist: Baldeep Chahal Editor: Verity Wilde