assaulted on public transport across east asia. visitors to one of the sites could even order their own tailor—made videos. bbc eye'sjow—yin fung reports from tokyo. this is nagoya injapan. translation: there is a guy looking for a target. - the railway police are running a covert operation, on the hunt to catch sexual assaulters. translation: | would - like to follow him to check his behaviourfor a bit. sexual violence against women in public is a global phenomenon. but injapan, the problem is so endemic that it has its own name, chikan. translation: you're riding back and forth on a single ticket. - it looks like the kind of behaviour a chikan perpetrator would make. the suspect is taken to the police station for further questioning. chikan has been normalised over the years by its prominence in the adult entertainment industry.

but the reality is much more sinister. translation: in the trick of the trade, it felt - like a hand hitting me. takako, not her real name, was only a teenager when she was sexually assaulted on the train for the first time. translation: it started to feel like it was touching and grabbing me. i that's when i finally realised that this was chikan. i was sexually assaulted almost every day. bbc eye has been investigating a network of websites selling thousands of videos of women being sexually abused on public transport across east asia. this is a horrific business of sexual assault. the websites are run by a shadowy figure known as uncle qi. but who is he? our investigation has led us to tokyo, where we tracked down uncle qi and his close associates.

translation: hi. hi, noctis? posing as a potential investor, our undercoverjournalist met with them multiple times, until uncle qi himself agreed to meet us. in this meeting, tang zhuoran, a 27—year—old from china admits to being uncle qi. the man behind all the websites we have been investigating. translation: how many people do you have in your current team? - translation: i have a team of 15 people. | he also admits to making huge profits. cashing in on sexual violence against women. translation: our daily | turnover is £550 to £1100. we located an address for him in tokyo and went to put our allegations to him. translation: my name's zhaoyin feng, i'm a reporterfrom the bbc. we know that you are

the online persona uncle qi. do you do this for the money or do you enjoy abusing these women? stop, stop, stop! hey! we put our allegations to him. his only response is silence. and then violence. he has since leftjapan. his associates say they are no longer working with him. the country is set to reform its sexual assault laws. however, campaigners say these changes don't go far enough. zhaoyin feng, bbc news. at least one person and others have been injured in russian sulphur —— alpha. people are still being evacuated from the region that's

been flooded by water from the dam. president zelensky has visited the area and has appealed for international help with the rescue effort. both ukraine and russia have warned that landmines may have become dislodged by the flooding. andrew duncan told me more about the threat of landmines that have been floating in the floodwater. the mines are not floating in the water as described, but they are certainly being washed down as a lot of debris would have done in the initial deluge. the dam and the river there represents the front line in this conflict and there would have been defensive minefields along large sections of the river and certainly around the dam. when the dam was breached, a lot of these mines were swept into the water and they have been pushed down just like you might see in an avalanche in the alps perhaps. so that's the thing, the mines have

now been washed further down and they are being caught up in that deluge and where they end up, they may end up in areas heavily silted as a result of that deluge, and therefore they represent a significant problem to try and find them when the waters finally subside. i was going to say, a near impossible task of trying to find them, dislodge them and make them safe. there is already a lot of concern that their original location was not mapped and it was difficult to know where these mines were. that makes this job even harder, doesn't it? yes. what we are doing is we know where the front lines are and we have estimated where the likelihood of those mines originally were, so we are mapping the deluge and the flood waters so we can begin to forecast where those mines have ended up, so that when the waters recede we can provide advice on both sides of the river

as to the hazard that remains. do you have any sense at this early stage about how many mines we are talking about? no. we are trying to calculate the volume of mines that were laid, so we are using standard military statistics in terms of the length of a minefield, the thickness of a minefield and the likelihood of the number of mines, so we are working on that, but we are certainly talking in the region of thousands of mines have been dislodged. before we can even talk about a clear up operation, the sense that this is now a problem for many years to come, there is no immediate solution for clearing up these mines that are in place as we simply don't know? the first thing of course is that the conflict is ongoing, so there will be no attempt to clear up these mines until the fighting has stopped.

but yes, once we are able to get onto the land there is a systematic and slow process of beginning to search and identify areas where we have the hazard and then slowly clearing it up after. but the first thing is to cease the fighting. the british prime minister, rishi sunak is in the us, where he will meet presidentjoe biden in his first visit to the white house since he took office. the men are expected to discuss the war in ukraine and further support for the government in kyiv. mr sunak was asked if there was any new intelligence on who destroyed the dam in ukraine. do you have an update yet on the responsibility of who bombed the dam in ukraine? and when you see president biden today, in the run—up to the trip

number 10 spoke about increasing military assistance, is there any new announcements or anything concrete you want to discuss with the president later? we are still establishing definitively the cause of the attack on the dam in ukraine, but i want people to know we are playing our part to support the ukrainians in their response. we have provided resources to the united nations and the red cross. in advance, anticipating incidents like this, those resources are now being moved into the region to help support those families affected. this is an appalling act and hundreds of thousands of people are being affected by it. we will continue to provide support for ukraine. we discussed this at the g7 just the other week injapan and we have provided long—range weapons, the first country in the world to do so. that is making a material difference to ukraine's ability to launch its counteroffensive. but we are in constant dialogue to make sure we give them the support they need. the former president of russia warned the uk's military involvement in ukraine made us a target for russia.

should the british public be scared and what would your message to them be? i think this was an illegal, unprovoked act of aggression on russia's part. nobody did anything to justify that. russia decided to unilaterally invade another country, cause an enormous amount of suffering to its people and what you've seen actually is an incredibly united response from countries, everywhere from america, where we are now, all the way through to the pacific. countries that have come together to provide significant military, economic and humanitarian support for ukraine and its people because the values that we are defending — democracy, freedom, the rule of law, are universal. they apply to us all and when they are challenged in the way that russia has challenged them, it's right we come together to defend them.

one of the world's most active volcanoes has erupted, spewing massive flows of lava around the crater floor in hawaii. this amazing footage is of the kilauea volcano — which is located in a closed area of hawaii volcanoes national park. it erupted on wednesday, for the second time this year. kilauea is one of the world's most active volcanoes. let's return to our top story of knife attacks on a number of young children in france in annecy. these are pictures of the french prime minister who has made her way from paris to annecy on the italian swiss border. meeting with the interior minister and also the mayor of annecy. confirmation that a british child was one of the four children injured and also a dutch national. the attacker is in custody and an investigation has begun. some

weather changes are now starting to take place. today really has been one of the same. today really has been more of the same, more of the weather we've become used to. early low cloud burning back towards the east coast and then some warm sunshine. but, down to the south west of us, you can see this lumpy cloud, some showers and some thunderstorms looming. and just ahead of that over the next few days, a feed of much warmer and much more humid air. i think you really will notice the difference. now, this weather is not going to be extreme or certainly unprecedented for the time of year, but it will feel very different, much warmer, much more humid by day and by night, with the chance of some thunderstorms. but it's back to the here and now. apart from the low cloud along the east coast, most of us will continue to see some sunshine, just one or two showers creeping across the isles of scilly. highest temperatures in the west up to around 2a or 25 degrees. tonight, we will see some showersjust creeping towards the south west of england. and here, an increasingly warm and humid feel, a sign of things to come.

the overnight low in plymouth, around 13 degrees, still quite a lot cooler further north and east with some of this low cloud rolling into eastern and central parts of scotland and england, then tending to retreat towards the coast tomorrow to give some spells of sunshine. but there is still the chance of one or two showers down towards the south west, maybe in northern ireland later as well. and temperatures will be climbing. we could see highs of 22, 23 degrees in northwest scotland, but 22 to 27 for wales and for central and southern parts of england. into the weekend this area of low pressure churning to the southwest of us will throw this weather front northwards and that will bring some hit and miss thunderstorms. there will be places that stay completely dry. there will be others that get a real deluge with hail and gusty winds likely to develop. and just ahead of that band of showers and thunderstorms, an increasingly warm and humid feel. temperatures could get to 29, possibly 30 degrees. and saturday night will be a very warm and humid one indeed.

into sunday, those showers and thunderstorms perhaps becoming a little more widespread, spreading north and east, but there will still be places that avoid them and stay dry with patchy cloud and spells of sunshine. still pretty warm for many of us, maybe just a little bit cooler out towards the west.

live from london.