from our studio in tokyo this is nhk "newsline." we begin in the united states where donald trump has declared himself the president of law and order. vowing to end the violent protests across it country by calling in the u.s. military if governors don't, quote, establish an overwhelming law enforcement presence. the riots began after an unarmed black man died in police custody in minneapolis a week ago.

on monday george floyd's brother visited the site where a white police officer knelt on floyd's neck for minutes during an arrest. surrounded by protesters terence floyd called on them to demonstrate peacefully. >> if i'm not over here messing up my community, so what are y'all doing? what are y'all doing? y'all doing nothing because that's not going to bring my brother back at all. it may feel good for the moment just like when you drink, but when you come down you're going to wonder what you did. >> the family says an independent autopsy found floyd died from asphyxia due to neck and back compression. despitee curfefews imposed in dozens of cities protests have become violent in many areas.

shops have been looted and cars set on fire. "the new york times" reports the demonstrations have spread to 140 cities in at least 40 states. more than 4,400 people were reportedly arrested over the weekend. with the escalating violence president trump told governors on a conference call to get tough on protesters. reuters obtained this audio. >> we have all the men and women you need, but people aren't calling them up. if you don't dominate you're wasting your time. they're going to run over you and you're going to look like a bunch of jererks. >> wte house p press secretary added the president has made clear violent acts are unacceptable. hong kong police have banned an annual vigil commemorating the 1989 square incident in which the chinese government used force to quell

pro-democracy demonstrations by students. it's the f first time the eveve will not go ahead since it started in 1990. the gathering has been held on june 4th to remember those who were killed and called for the truth to come out. the city group that organizes the vigil says 180,000 people attended lasast yeyear. there are concerns rallies like this may be banned starting next year after beijing adopted a planan last month to introduce national security legislation that would crack down on anti-government activities in hong kong. >> translator: the hong kong government has banned the gathering as if the legislation has already been enacted. >> people cannot talk about the incident in public in mainland china, but hong kong has been allowed to hold rallies and marches under the one country, two systems principle.

the organizer plans to hold an online rally thursday night. japan is considering easing entry bans on business travelers from four asia pacific countries. officials cite the relatively stable coronavirus situations in each of the nations as well as close economic ties with japan. the government may allow the entry of people from thailand, vietnam, australia and new zealand as early as this month. any easing would be the first since the bans were initially imposed earlier this year. the plan may include asking would-be travelers to take a virus test before leang for japapa >> translator: the virusus continues to spread, mainly in emerging andnd developing countries. the situation requires caution. it is also important to think about resuming international traffic.

>> currently japan bans arrivals from 111 countries and territories including the u.s., brazil and russia. it also recommends japanese nationals refrain from traveling to anywhere on the list. experts in japan are calling on people to practice precaution when wearing face masks in the summer. they say wearing masks couldld elevate breathingg and heartrt rate. on monday the japan assocoction fofor acute medicine and three other doctors groups proposed ways to prevent heatstroke while wearing a mask. a new normal for many people in the coronavirus era. they advised plenty of rest and hydration and taking off the mask when appropriate and able to maintain distance from others. >> translalator: it could be difficult to distinguish between heatstroke patients developopina fever and c coronavirus patient. it may take emergency responders

time to find hospitals to take them in. >> to stay safe indoors the groups recommend using curtains to keep the room temperature from spiking. ventilating the room will also help lower the risk of infection from the coronavirus. light exercise at home or easy walking is helpful in acclimatizing to the heat, they added. the experts also stressed a need to keep an eye out for the elderly who live alone. japan is prone to natural disasters. floods, earthquakes and othther catastrophes can lead to crowded conditions in evacuation centers. this means a greater infection risk. our next story looks at some new approaches to social distancing. >> reporter: a at the same times the virus spread in march heavy rain and molten snow in thehe tn of prefecture caused river levels to rise dangerously. local officials sent out an

evacuation order. about 200 people crowded into this they were given sheets laid out 2 meters apart for safety. experts agree the risk of contracting the new coronavirus at an evacuation shelter is higher if normal crowding is allowed. nhk conducted an experiment with the help of researchers. when a person sneezes in a room with no air movement -- droplets travel over a concentrated area for about 1.5 meters. the risk of inhaling the virus will be greater for anyone lying or sitting on the floor. the professor at the university

has compiled various anti-infection measures in a manual for emergency shelters. her chief aim is to prevent evacuees from inhaling droplets containing the virus. one practical way to do this is for people to surround themselves with partitions made from cardboard boxes while keeping a 2 meter distance from others. evacuees can also sleep on elevated cardboard beds. this reduces the risk of touching the floor which may be contaminated. >> translator: you should stay away from the floor as much as possible to avoid exposing yourself to any virus that may be there. >> reporter: anti-virus measures can also mean good planning. officials in adachi city, tokyo evacuated 30,000 residents last year. the city is now crting

guidelines to evacuate residents to cars, hotels and tents. this multimodal evacuation will help spread out crowds and maintain social distancing. city officials have also sought agreement from local businesses to use their empty office space for emergency shelters. >> translator: our normal evacuation procedures are useless in this era of coronavirus. we hope our new system will keep residents safe. >> reporter: natural disasters can strike at any time. by creating safe evacuation conditions we can avoid facing multiple emergencies at once. ♪

and now moving onto world weather. one of the longest heat waves on record hit north and central india with temperatures reaching 50 degrees celsius last week.

our meteorologist tells how long the heat will remain. >> h hello there. heat builds up in northth and central india as a preview to the monsoon season. the rainy season normally arrives at the end of june in northern india. until then another round of heat conditions can be expected. meanwhile the wet season has just arrived in southwestern india and sri lanka. monsoon rains arrived on monday. the country often received up to 900 millimeters of rainfall during the rainy season. heavy rainfall over a period of four months caused flooding and traffic delays. more wet weather will arrive in the area on wednesday as a storm intensifies over the arabian sea. as the storm system approaches the coast heavy downpours and gusts as high as 150 kilometers

per hour will be possible. showers will also bring a few cooler cessions in mumbai over the next few days. southwest monsoons have also affected the rainy season front that stretches across southern china. some places already received 100 millimeters of rain in the past 24 hours. through the next 24 hours another 100 millimeters is possible in the same locations. and in japan we are still seeing unstable weather especially in the northern portions of of the country. on tuesday you may get some bursts of heavy rainfall, hail and gusts along with severe thunderstorms. unstable weather is also expected in the munens luas another low pressure system approaches. so we'll have a chance of showers on tuesday with a high of 22 degrees.

tokyo may get a sudden burst of thunderstorms in the afternoon. that's all for now. stay safe and have a nice day.

and we leave you for now with a surprise display that delighted people across japan. the pop and crackle of fireworks exploding into a dazzle array of light is a familiar sign of summer here in japan. but not so this year. the events are being canceled as cities tamp down on large gatherings that can spread infections. about 160 firework companies to organize this five minute

display without telling people where it wouldd happen. they say the show is a a thank u to medical workers and everyone else trying to stop covid-19. and that wraps up this edition of nhk "newsline." thank you very much for joining us. welcome to "newsline in depth." i'm mari yanaka. going to the zoo can be a fun way to learn about animals. but the facilities do so much more than just provide us with entertainment. today we have some stories about animals as well as the people helping them to survive and thrive. now, zoos are always popular especially with kids.

but with japan's low birthrate and declining population many zoos here are struggling, so some are coming uppia ne unique strategies to attract visitors. our first report goes to one such zoo in southern japan. >> the sight and sound of hippos crunching on watermelons has racked up more than 120 million videdeo views worldwide. >> translator: it's surprising. we really didn't imagine it would be this popular. >> he's in charge of making the videos from nagasaki bio park. with plenty of feathered and furry material to choose from he turns out around eight videos a month, and he keeps a close eye on the stats they generate.

the more popular the videos the more income they generate from streaming. the zoo uses the funds to improve facilities like this new feeding terrace. it's good pr, too. since the hippo video went viral visitor numbers are up. >> translator: i saw the zoo on social media and decided to come. >> foreign visitor numbers are up 20% year on year. >> i've been here four times. >> he's now looking for his next hit, and he's banking on the cappibera's he's trying to capture the sound of the animals ununder a trickle of water. >> translator: sometimes it's difficult to catch the moment

but i try to make v videos that look as natural and spontaneous as possible. >> eventually he hopes to have the full zoo online so peoplee everywhere can see the collection with one click. >> that hippo video was a lot of fun. now, this one shows guinea pigs walking in line to get home. only someone who's spent a lot of time with the animals and knows their every move can capture the interesting moments for people around the world to enjoy. but zoos aren't just for enjoying cute animals. they also have a mission to protect rare species. once such animal is the giant panda, a breed native to china. in the '70s there were only about 1,000 giant pandas in the wild. and until a few years ago it was listed as an endangered species. japan has ten of them in three different zoos on loan from china for breeding purposes. pandas are notoriously difficult

to breed in captivity, but one living at a zoo in western japan is famous for being father to over a dozen cubs. zoo keepers are hopeful for more to come despite the panda's age. 80 in human years. >> adventure world is home to six giant pandas, the largest family in the country. >> 25 years ago when the panda became one of the world's most endangered species a large scale zoo joined forces with a breeding center in china. the result has been a black and white success, 16 cubs. a record number outside china. and a male has played a starring role in this affair. ever since china offered him on

loan to the zoo in 1994. he has sired 15 of the cubs born at the zoo. as part of the conditions of eimei's loan pandas bred here are relocated to china. his most recent offspring came into the world in 2018 when eimei was 25 making him the world's oldest captive panda to father a cub through natural breeding. the average life-span of pandas living in captivity is between 25 and 30 years. does 27-year-old eimei have it in him to become a father again? she's been taking care of him for over a decade is dedicated to keeping him tip toff toward

that end. >> translator: since he's aging we are giving top priority to eimei's health and we hope the breeding goessmith smoothly. with his age, though, i see he doesn't have the stamina as before. >> staff record eimei's every move. ththey carefully check the imag to seeee i if he's scent markin communicating vocal l love cueu indicating feeling amorous. as part of his regular check ups blood samples are taken every two weeks, and his blood pressure once a month. keepers use incentives like food to get eimei exercising, keeping his lower legs strong is vital to successful breeding. special attention is also paid

to diet. eimei like most pandas eats around 20 kilograms of bamboo every day. but the breeders here collect three times that amount, which they sort manually for quality to suit eimei's and mood. >> eimei is a real gourmet that only eats the picky parts. you never really know until you feed him. >> his mate is -- the 19-year-old was born at the zoo

to a different male. the two seem t to click and chemistry is key in successful panda breeding. they've produced nine cubs so far. eimei may very well break his own record of the oldest male panda to produce an offspring. >> translator: i think he still has the spark. as long as he has the will i hope he goes for it. >> translator: we just try to follow the daily health maintenance program t to keep eimei fit to ensure morere successf successful mating. i just hope another cute baby panda will be born and loved by everyone. >> spring, when females come into heat for two too three day is mating season for pandas. will eimei have the stamina to

keep up the roromancing? >> if he fathers another cub it will be eventually returned to china as all panda babies born in japan are. that way they can help grow the panda population in their home country. in our final story we meet a japanese woman working at a breeding center in china who's dedicated her life to the panda cause. >> the birthplace of the panda. 200 of the animals live at this breeding facility. experts hope some of them will one day be released into wild. she's a worker at the site. she fell in love with pandas as a child. she went to study in china in hope of getting closer to the animals and work at the

she scored her dream job back in japan becoming a panda keeper at a tokyo zoo. but her joy would eventually turn to despair when a baby panda in her care died six days after its birth. >> i was devastated. it was so hard. i never want to go through something like that again. >> abe eventually returned to the breeding center in china to brush up her skills. a few times a week she works overnight to feed the cubs milk and rub them to help with their digestion. sometimes it's a challenge to get the little ones to breast-feed from their mothers.

abe imitates a cubs cry in an effort to stimulate the process, but it doesn't always 30 minutes later abe tries again this time with success. one of her responsibilities is keeping the pandas in good shape. for mealtimes she has devised a contraption that gives the animals a little work out. not just for their bodies but their minds, too. to get their food they have to climb down and reach up into the basket. >> translator: i think it's good for the pandas. they have to find the food which stimulates their brains.

>> abe keeps a detailed record for her observations and notes down everything her coworkers teach her. >> translator: i want to absorb eveverything and keep trying to improve. my dream is to help grow the number of giant pandas living in the wild. >> the this effort is one of the success stories but abe and her colleagues know there's much work to do before pandas are flourishing once again in their natural habitat. >> thanks to the kind of efforts we saw today giant pandas are no longer classified as endangered, and their number in the wild is not far off doubling from its low point. but there are about 8,000 other animal species around the world still listed as endangered or critically endangered.

and humans are said to be behind the current high rate of species extinction. there's still much to be done to protect animal life so that all creatures can thrive and prosper in their natural habitat. and that's all for

brother callsd's for peaceful protests over his death. --rge died from assist asphyxiation from sustained pressure. ♪ you are watching al jazeera in london. also coming up. ramp up across the u.s. and president trump urges governors to be tougher and call for more national guards. chilly passes 100,000