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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Operating Segments [Abstract] |
Summary of Segment Information | The segment information for the years ended December 31, 2020, 2019 and 2018.
|  | 2020 |
|  | Revenue |  |  | Depreciation Amortization |  |  | Operating profit(*2) |
|  | (In millions of Korean won) |
Online |  | W |  | 107,949 |  |  | W |  | 1,609 |  |  | W |  | 45,115 |
Mobile |  |  |  | 336,326 |  |  |  |  | 1,823 |  |  |  |  | 42,493 |
Others |  |  |  | 22,333 |  |  |  |  | 1,488 |  |  |  |  | 510 |
Sub total |  |  |  | 466,608 |  |  |  |  | 4,920 |  |  |  |  | 88,118 |
Inter-segment eliminations(*1) |  |  |  | (60,655 | ) |  |  |  | — |  |  |  |  | 250 |
Total |  | W |  | 405,953 |  |  | W |  | 4,920 |  |  | W |  | 88,368 |
|  | 2019 |
|  | Revenue |  |  | Depreciation Amortization |  |  | Operating profit(*2) |
|  |  | (In millions of Korean won) |
Online |  | W |  | 48,182 |  |  | W |  | 1,401 |  |  | W |  | 7,754 |
Mobile |  |  |  | 346,878 |  |  |  |  | 1,145 |  |  |  |  | 38,655 |
Others |  |  |  | 19,352 |  |  |  |  | 1,107 |  |  |  |  | 562 |
Sub total |  |  |  | 414,412 |  |  |  |  | 3,653 |  |  |  |  | 46,971 |
Inter-segment eliminations(*1) |  |  |  | (53,445 | ) |  |  |  | — |  |  |  |  | 1,692 |
Total |  | W |  | 360,967 |  |  | W |  | 3,653 |  |  | W |  | 48,663 |
|  | 2018 |
|  | Revenue |  |  | Depreciation Amortization |  |  | Operating profit(*2) |
|  |  | (In millions of Korean won) |
Online |  | W |  | 41,288 |  |  | W |  | 238 |  |  | W |  | 4,286 |
Mobile |  |  |  | 257,364 |  |  |  |  | 473 |  |  |  |  | 24,795 |
Others |  |  |  | 9,526 |  |  |  |  | 715 |  |  |  |  | 1,086 |
Sub total |  |  |  | 308,178 |  |  |  |  | 1,426 |  |  |  |  | 30,167 |
Inter-segment eliminations(*1) |  |  |  | (21,408 | ) |  |  |  | (12 | ) |  |  |  | 3,201 |
Total |  | W |  | 286,770 |  |  | W |  | 1,414 |  |  | W |  | 33,368 |
(* 1) The Group reflects inter-segment eliminations as adjustments. (* 2) Other profit or loss items that do not constitute operating profit (loss) are not separately disclosed because they are not reviewed by the chief operating decision maker by operating segment.
Summary Revenue from External Customers by Country | (2) Revenue from external customers by country for the years ended December 31, 2020, 2019 and 2018 are as follows:
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  |  | (In millions of Korean won) |
Korea |  | W |  | 109,895 |  |  | W |  | 45,273 |  |  | W |  | 80,814 |
Taiwan |  |  |  | 100,049 |  |  |  |  | 52,118 |  |  |  |  | 98,210 |
Japan |  |  |  | 22,500 |  |  |  |  | 28,469 |  |  |  |  | 9,767 |
The United States of America |  |  |  | 20,659 |  |  |  |  | 55,062 |  |  |  |  | 10,572 |
Thailand |  |  |  | 59,086 |  |  |  |  | 62,043 |  |  |  |  | 43,846 |
The Philippines |  |  |  | 23,690 |  |  |  |  | 30,951 |  |  |  |  | 15,539 |
Indonesia |  |  |  | 12,729 |  |  |  |  | 22,355 |  |  |  |  | 9,359 |
Other |  |  |  | 57,345 |  |  |  |  | 64,696 |  |  |  |  | 18,663 |
Total |  | W |  | 405,953 |  |  | W |  | 360,967 |  |  | W |  | 286,770 |
(*) Revenue was attributed to the country based on the customer’s location.
Summary of Non-Current Assets by Geographical Regions | Non-Current assets by geographical regions as of December 31, 2020, 2019 and 2018 are as follows:
|  | December 31, 2020 |  |  | December 31, 2019 |  |  | December 31, 2018 |
|  | (In millions of Korean won) |
Domestic |  | W |  | 7,612 |  |  | W |  | 5,732 |  |  | W |  | 3,054 |
Overseas |  |  |  | 5,481 |  |  |  |  | 4,170 |  |  |  |  | 1,045 |
Total |  | W |  | 13,093 |  |  | W |  | 9,902 |  |  | W |  | 4,099 |
(*) The amounts are exclusive of financial assets and deferred tax assets. (3) No individual external customers accounted for more than 10% of consolidated revenue for the years ended December 31, 2020, 2019 and 2018.

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