Two Japanese winners of this year's Nobel Prizes took part in the award ceremony in Sweden on Wednesday.
The event was held in a concert hall in central Stockholm.
Kitagawa Susumu, an executive vice-president of Kyoto University, is among the three winners of the Nobel Prize in Chemistry.
A member of the Nobel Committee for that award said in a speech: "You have made groundbreaking discoveries in chemistry that have led to the development of metal-organic frameworks. This is a truly great achievement for the benefit of humankind."
To a fanfare, Kitagawa and the two other laureates, Richard Robson and Omar Yaghi, were presented with the medal by King Carl XVI Gustaf.
Sakaguchi Shimon, a distinguished honorary professor of the University of Osaka, is one of the three winners of the Nobel Prize in Physiology or Medicine.
A member of the Nobel Committee for that award said the winners have revealed "how the immune system restrains itself to protect the very body it serves without attacking it." He added, "Their work opens up new avenues to treat autoimmune diseases, enhance cancer immunotherapy and promote transplant tolerance."
Sakaguchi, along with the two other winners, Mary Brunkow and Fred Ramsdell, received the medal from the king.

Quiz 1:
Who won the Nobel Prize in Chemistry this year?
A. Kitagawa Susumu
B. Sakaguchi Shimon
C. Richard Robson
D. Omar Yaghi

Quiz 2:
In which city was the award ceremony for this year's Nobel Prizes held?
A. Kyoto, Japan
B. Stockholm, Sweden
C. Osaka, Japan
D. Gothenburg, Sweden

Quiz 3:
What did the winners of the Nobel Prize in Chemistry contribute to?
A. Metal-organic frameworks development
B. Discoveries in physics
C. Autoimmune diseases treatment
D. Enhancing cancer immunotherapy and promoting transplant tolerance