Question: What Nationality are the actors that are in a movie that is based on the Japanese novel "Journey Under the Midnight Sun".

Context paragraphs:
The Secret Series: The Secret Series is a series of 'secret'-themed adventure novels written by Pseudonymous Bosch, who is suspected to be Raphael Simon.  The series centers on three middle school children, Cass, Max-Ernest, and Yo-Yoji, and their adventures as members of the Terces Society ("secret society" spelled backwards), a group that keeps a mysterious Secret from being found out or stolen by the Midnight Sun society.  One of the subplots of the series is the alchemists of the Midnight Sun searching for the secret to immortality, and the Terces Society's plans to stop them.

Midnight Sun Run: The "Fairbanks Daily News-Miner" Midnight Sun Run is a ten kilometer road running event, held annually since 1983 in Fairbanks, Alaska, that attracts participants from across the United States and Canada.  The race takes place on the third Saturday of June each year, starting at 10 pm with the boom of a cannon that can be heard throughout Fairbanks.  Despite its late evening start, there is no need for streetlights or flashlights, as the summer solstice sun shines brightly from start to finish and beyond.  Proceeds from the race benefit United Way of the Tanana Valley and local student athletes through scholarships.  In recent years the race has attracted over 3,000 participants, due in part to its special feature of running in the daylight of the midnight sun.

Midnight Sun Solar Race Team: The Midnight Sun Solar Rayce Car Team is a Canadian solar car race team affiliated with the University of Waterloo of Waterloo, Ontario.  Founded in 1988, the Midnight Sun team is a student-run organization which designs and builds a solar vehicle every two to three years to compete in two solar challenges; the World Solar Challenge, held in Australia, and the American Solar Challenge, held in the United States.  The team's roster recruits from every department on campus, resulting in a diverse, innovative team and work environment.

Midnight sun: The midnight sun is a natural phenomenon that occurs in the summer months in places north of the Arctic Circle or south of the Antarctic Circle, when the sun remains visible at the local midnight.  Around the summer solstice (approximately 21 June in the Northern Hemisphere and 22 December in the Southern Hemisphere) the sun is visible for the full 24 hours, given fair weather.  The number of days per year with potential midnight sun increases the closer towards either pole one goes.  Although approximately defined by the polar circles, in practice the midnight sun can be seen as much as 55 miles (90 km) outside the polar circle, as described below, and the exact latitudes of the farthest reaches of midnight sun depend on topography and vary slightly year-to-year.

Polar night: The polar night occurs in the northernmost and southernmost regions of the Earth when the night lasts for more than 24 hours.  This occurs only inside the polar circles.  The opposite phenomenon, the polar day, or midnight sun, occurs when the Sun stays above the horizon for more than 24 hours.  "Night" is understood as the center of the Sun being below a free horizon.  Since the atmosphere bends the rays of the Sun, the polar day is longer than the polar night, and the area that is affected by polar night is somewhat smaller than the area of midnight sun.  The polar circle is located at a latitude between these two areas, at the latitude of approximately 66.5 degrees.  In the most northern city of Sweden, Kiruna, at 67°51'N, the polar night lasts for around 28 twenty-four-hour periods, while the midnight sun lasts around 50 twenty-four-hour periods.  While it is day in the Arctic Circle it is night in the Antarctic Circle.

Midnight Sun (Elena song): "Midnight Sun" is a song recorded by the Romanian female singer Elena Gheorghe.  The song was recorded in summer 2010 and premiered on November 15, 2010, on Gheorghe's official YouTube channel.  It was released under Cat Music exclusively in Romania.  The song has more house influences than the previous number-one hit "Disco Romancing".  It was sent to the mainstream radio stations in late November and it is promoted as the second single taken from Gheorghe's album entitled "Disco Romancing".  Lyrically, the song describes the shiver a millionaire wannabe guy gets when he sees Elena dancing.  The song had its official radio premiere on the Romanian National Day, at radio ZU, though it premiered on Kiss FM a week earlier.  Elena performed "Midnight Sun" live, on December 31, during a New Year special show, held by Pro TV.  The music video was already shot in Bucharest and it was released via YouTube on May 13, 2011.  The video features many special effects as well as the track listing for Gheorghe's upcoming album.  The song peaked at number-one the Radio Top 50 and charted within the top ten in two other Romanian charts.  In the official Romanian Top 100 it peaked at number-ten, thus making it Elena's fifth song to enter the top ten in Romania, after "Soarele meu", "Vocea ta", "The Balkan Girls" and "Disco Romancing".  The song was performed at many dates throughout Romania.

White Night (film): White Night (; lit.  "White Night: Walking Through White Darkness") is a 2009 South Korean mystery thriller starring Han Suk-kyu, Son Ye-jin and Go Soo.  It was based on the Japanese novel "Journey Under the Midnight Sun" by Keigo Higashino.

Go Soo: Go Soo (born October 4, 1978), also known as Ko Soo, is a South Korean actor.  He has appeared in television series such as "Piano", "Green Rose" and "Will It Snow for Christmas? ", as well as the films "White Night" and "The Front Line".

Tromsø Midnight Sun Marathon: Tromsø Midnight Sun Marathon is the northernmost Association of International Marathons and Distance Races certified marathon in the world.  The Midnight Sun Marathon is hosted annually by the Norwegian city of Tromsø in June each year.

Midnight (Beast song): "Midnight (The Night I Count the Stars)" (Japanese: 星を数える夜 "Hoshi wo Kazoeru Yoru"; Korean: 별 헤는 밤 "Byeol Heneun Bam") is a song released by the South Korean boy band Beast.  It was released digitally in South Korea on July 15, 2012 as a pre-release single of the group's fifth mini album "Midnight Sun", released a week after.  The song was later re-recorded in Japanese and was used as the group's third Japanese single, released on October 17, 2012.

Supporting paragraphs: Go Soo White Night (film)
Answer: South Korean