misao okawa was 117. okawa had been living at a nursing home in osaka. staff members say she fell ill about ten days ago, and died wednesday of natural causes. okawa was born on march 5th, 1898 and she lived at a time before home telephones or air travel. guinness world records had listed her as the oldest person on the planet. and it says she had three children, four grandchildren, and six great-grandchildren. >>> japan and south korea mark the 50th anniversary of diplomatic ties this year. political relations have recently been strained but at the grassroots level, cultural exchanges go on. exchanges between japan and korea have a long history, beginning in 1607. korean kings sent a series of diplomatic missions to japan. they wanted to congratulate japan's new rulers and deliver formal letters from the king. the missions continued for 2 1/2 centuries. nhk world looks at how people in both countries are trying to preserve the mission's message of peace. >> reporter: this was once the main loyal palace. now it's the starting point for a walk from seoul

today from japan as i don't know if you heard the world's oldest person, a woman by the name of misao okawassed away. there she is. we celebrated her birthday three weeks ago. she turned 117. then just like that, it was over. so now the title of oldest person alive belongs to an american, gertrude weaver, 116-year-old woman from arkansas. not only is gertrude the oldest woman in the world, she is the only woman in the world still named gertrude. by the way, how many oldest people in the world need to die before the police do something about it? wake up, people. there's a serial killer on the loose. speaking of police, we were in austin, texas, a couple of weeks ago for the south by southwest festival. it was a lot of fun. snoop dogg was there which is part of the reason why it was a lot of the fun. snoop was invited to give the keynote speech at the festival. and at some point he took this photograph with a trooper from the department of public safety. he posted to instagram with the caption "me and my deputy dog." which is harmless, right? well, unfortunately, the trooper, his name is bill

misao okawa passed away in japan at the age of 117. been declared the world's oldest person in 2013. the title now goes to an american, gertrude weaver of arkansas, who is 116 years old. and gary dahl, creator of the 1970's bewilderingly popular fad, the "pet rock," has died. he made a fortune selling plain rocks, in a box, for $3.95. gary dahl was 78 years old. >> woodruff: still to come on the newshour: the latest on a possible iran nuclear deal. california grapples with a historic drought. debating the right to die in canada. atlanta educators found guilty in major cheating scandal. do education programs that invest in young men of color leave out young women? and, writer t.c. boyle's latest novel exploring the violent, dark side of the american psyche. >> ifill: the talks between iran and six world powers seemed to be headed into yet another day. the deadline for a framework agreement expired last night. and no deal was reached today but the u.s. said enough progress has been made to continue the negotiations. major points of disag