Korean Family tree help?

How do I find info about my family who left Korea around the time of the Japanese invasion circa 1905-1910? They were somehow connected to the ruling Lee (Yi) family of Seoul. I understand that most aristocratic Korean families have extensive genealogies. Their names were Sang Ok Lee and Young Hee Lee. He was forced into service for the Japanese military–are there records available for something like that?
Thanks!
yep, that’s them, in the census. Thanks for the lookup!
The colorado one is not him.

I found this listing on www.familysearch.org. (does it sound right, as to dates, etc??)
Sang Ok LEE
Birth Date: 10 Jan 1912
Death Date: 15 Oct 1998
Social Security Number: 521-29-9088
State or Territory Where Number Was Issued: Colorado
Death Residence Localities
ZIP Code: 80918
Localities: Colorado Springs, El Paso, Colorado
Colorado Springs, El Paso, Colorado

www.ancestry.com–1920 United States Federal Census
Name: Sang K Lee
[Song OK Lee]
Home in 1920: Kaalualu, Hawaii, Hawaii Territory
Age: 47 years
Estimated Birth Year: abt 1873
Birthplace: South Korea
[Korea, Republic of]
Relation to Head of House: Head
Father’s Birth Place: South Korea
Mother’s Birth Place: South Korea
Marital Status: Married
Race: Filipino
[Korean]
Sex: Male
Home owned: Own
Year of Immigration: 1903
Able to read: Yes
Able to Write: Yes
Household Members: Name Age
Sang K Lee– 47
Young Lee Lee– 37**
Lydia Lee– 11
John Lee– 9 8/12 (9 yrs. 8 mon)
Jelie Lee– 2 2/12 (2 yrs 2 mon)
Isabella Lee– 6 9/12 (6 yrs 9 mon)
Lee Sung Lee– 5 2/12 (5 yrs. 2 mon)
Pong Nay Lee –4
Eva Lee– 1 5/12 (1 yr. 5 mon)
Kee Chan Lee– 5/12 (5 mon)

**–The original view shows him as being a son, but that would make Sang Ok Lee, his father, only 10 years old when he was born??

Genealogy Center’s Military Symposium Part 1

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