Kono's three-day visit to Myanmar includes travelling to Rakhine state.
It was a rare acknowledgment of wrongdoing by the military during its operations in the western state of Rakhine.
The military, which has been accused of indiscriminate killings, rape and burning of Rohingya villages, acknowledged that security forces and villagers were responsible for the deaths of 10 people found in a mass grave in December.
"We hereby declare that these ten innocent Rohingya civilians found in the said mass grave in Inn Din Village Tract were neither ARSA nor had any association with ARSA", the group said.
The request comes after Myanmar military admitted that some of its soldiers were involved in the murder of 10 captured Rohingya men in western Rakhine state in September previous year and buried them in a mass grave near Inn Din village in Maungdaw township. "This incident happened because ethnic Buddhist villagers were threatened and provoked by the terrorists".
The army, which is not under the control of the civilian government, launched a sweeping counteroffensive in northern Rakhine in response to Rohingya militant attacks on August 25, triggering an exodus of more than 650,000 Rohingya villagers to Bangladesh. "There will be an ongoing investigating process whether they are members of ARSA or not".
Raw meat diets pose danger to pets and owners, study finds
The raw meat diet for pets has been criticised by scientists, who say it could potentially be harmful to both animals and humans. Earlier analyses on raw pet food in the United States also found similar levels of contamination .
Suu Kyi made the comments Friday during a joint news conference with Japan's foreign minister.
The acknowledgement is an indication that the country is ready to own responsibility for any breaches in rule of law, said Suu Kyi, after meeting Japanese Foreign Minister Taro Kano, Efe news reported quoting the state media.
She added: "I believe our investigation will prevent such things from happening again". The killings took place on September 2, 2017, in the village of Inn Din, situated to the north of Sittwe, the capital of the state.
A statement from the military on Wednesday said its investigation had found that members of the security forces had taken part in the killing and action would be taken against them.
More than 655,000 Rohingyas have crossed into Bangladesh since August 25, escaping a military crackdown in Rakhine state, which many countries and human rights bodies have described as ethnic cleansing.