Revenues
As a result of our Company initiatives for growth as described above, the revenues derived from our Relaxation Salon Segment were JPY3,348,042 thousand (US$31,067 thousand) in 2018, and JPY3,864,656 thousand (US$35,860 thousand).
The revenue from our Relaxation Salon Segment consists of revenue from directly-operated salons (consisting of Company-owned salons and salons we operate as the outsourcer), and revenue from franchising. In 2018, we earned revenue from directly-operated salons and revenue from franchising of JPY1,477,985 thousand (US$13,714 thousand) and JPY1,870,057 thousand (US$17,352 thousand), respectively. In 2019, we earned revenue from directly-operated salons and revenue from franchising of JPY2,031,155 thousand (US$18,847 thousand) and JPY1,833,501 thousand (US$17,013 thousand), respectively.
We recognize revenue from initial franchise membership on the opening date of the new franchised salons. In addition, our revenue from franchise royalties includes revenues from recurring royalty income, rental income from subleased salon properties, construction of franchised salons,uniforms and training sales.
The revenue from our Preventative Healthcare Segment consists of revenue from Sampling business sales and revenue from our Specific Health Guidance Service. Our MOTHER Tracker® is still at the development stage and as such generates no revenue.
Cost of Revenues
For the year ended December 31, 2018 and the year ended December 31, 2019, the costs of revenues were JPY2,476,267 thousand (US$22,977 thousand) and JPY2,957,506 thounsand (US$27,443 thousand) respectively. With respect to cost of revenues, the largest cost driver was therapist salaries, which were JPY730,042 thousand (US$6,774 thousand) in 2018 and JPY783,132 thousand (US$7,267 thousand) in 2019. The cost to revenue ratios were 72.1% in 2018 and 75.7% in 2019, which was primarily driven by an increased number of salons in public bath facilities under the outsourcing agreements pursuant to which operations have been switched from Kabushiki Kaisha Joyhands to JOYHANDS WELLNESS Inc.
Selling, General, and Administration Expenses
For the year ended December 31, 2018 and the year ended December 31, 2019, the selling, general, and administration expenses were JPY842,822 thousand (US$7,821 thousand) and JPY871,862 thousand (US$8,090 thousand), respectively, resulting in an increase of selling, general, and administration expenses of JPY29,040 thousand (US$269 thousand). The percentage of revenue of selling, general, and administration expenses in 2018 and in 2019 were 24.5% and 22.3%, respectively.
Operating Income and Adjusted EBITDA
As a result of all above, our consolidated operating income in 2018 was JPY73,268 thousand (US$680 thousand), or 2.1% of consolidated revenue, while our consolidated operating income in 2019 was JPY34,350 thousand (US$319 thousand), or 0.9% of consolidated revenue. Our Adjusted EBITDA was JPY179,997 thousand (US$1,670 thousand) in 2018 and JPY139,301 thousand (US$1,292 thousand) in 2019, with an Adjusted EBITDA margin of 5.2%in 2018 and 3.6% in 2019.
Liquidity and Capital Resources
Liquidity is a measure of our ability to meet potential cash requirements. We generally funded our operations with cash flow from operations, and, when needed, with borrowings from Japanese financial institutions. Our principal uses for liquidity have been to fund development of new salons, acquisitions of salons or relaxation businesses from franchisees or third parties, development of new software for new business and/or internal use, our daily operations, working capital and debt service. We believe our sources of liquidity and capital will be sufficient to finance our continued operations, growth strategy and additional expenses we expect to incur as a public company for at least the next 12 months.