JPY6,350 (US$57.18) , and further increased to JPY6,634 (US$59.74) in December 2021. In the future, we may raise the prices of our services over time to keep up with increases in minimum wage and to maintain an appropriate margin. Our repeat ratio was 81.2% in June 2021, unchanged from the same month last year, and further increased to 81.7% in December 2021. As a result of our organic development and further consolidation through acquisitions, the number of salons in our group increased to 313 as of June 30, 2021 from 289 in the same month of 2020. As of December 31, 2021, we have a total of 312 salons. Total Customers Served also improved to 68,069 in June 2021 from 51,686 in June 2020, and further increased to 71,173 in December 2021. Our operation ratio increased from 40.8% in June 2020 to 48.6% in June 2021, and further increased to 50.5% in December 2021. We believe our operation ratio will continue to improve in the future, as we strive to improve the management of our therapists and increase operating efficiency.
New Business. In our Digital Preventative Healthcare Segment, we have been involved in the Specific Health Guidance Program, promoted by the Ministry of Health, Labor and Welfare of Japan, and have developed what we believe will be the only self-charging wearable activity device called MOTHER Bracelet™, which is expected to be launched in the first half of 2022.
Assessment of Impact of the COVID-19 to the Company’s Business Operations, Liquidity, and Capital Resources
The global outbreak of COVID-19 has continued to impact Japan throughout 2021. During the first half of 2021, the Japanese Government issued three series of Declaration of Emergency, whereby the Japanese Government requested the closing of non-essential activities and businesses across the country as a preemptive safeguard against the COVID-19 pandemic. This adversely impacted businesses across the nation, particularly in the retail segment in which we operate.
During the period, the COVID-19 pandemic and the Government-driven or voluntary closure of workplaces and public spaces, the reluctance or inability to commute on public transportation, shop, or enjoy outdoor leisure activities has affected our business operations and liquidity position. We undertook several measures to mitigate the impact on our Company and our employees. For example, we relocated therapists from salons that were closed or operating at a shortened hour to those lacking enough therapists, or issued furlough to those who cannot be relocated to other open salons, and we also applied for governmental subsidies.
Closure of Operations or Shortened Operations at Our Salons
During first half of 2021, we estimate approximately one-fourth of the salons on average had voluntarily shortened operating hours by 2 hours per day, and approximately 5% of the outlets on average were closed due to Declaration of Emergency and local governments’ request.
Although the declarations have been adversely affecting our business, we are managing our operations by relocating therapists from closed or shortened salons to those lacking enough therapists, or issuing furlough to those who cannot be relocated to other open salons and applying for governmental subsidies.
Fluctuation in Number of Served Customers and Sales Per Customer during the COVID-19 Pandemic
After the First Declaration was lifted on May 25, 2020, the number of our served customers recovered gradually. From January 8 to March 21, 2021, the government issued the Second Declaration. Tokyo, Kanagawa, Saitama, and Chiba prefectures, where the majority of our salons are located, were fully included within the scope of the Second Declaration. While this adversely affected our business, the negative impact on our number of customers served was much smaller than the those during the First Declaration. The number of customers served had dropped to the higher range of fifty-thousand customers in January and February 2021, but has recovered to the level of more than sixty thousand customers in March 2021.
The Third Declaration was issued from April 25, 2021 and the scope was expanded to finally ten prefectures including Tokyo, which was finally released from the declaration on June 20, 2021. Even with the Third Declaration, the numbers of customers served has not been adversely affected.
On July 8, 2021, the government issued the Fourth Declaration applicable to Tokyo during the period from July 12 to August 12, 2021. During such period, the City of Tokyo had the Summer Olympic games. On July 30, 2021, the government announced it would add Saitama, Chiba, Kanagawa, and Osaka prefectures to the scope of the declaration from August 2 to 31, 2021. On August 17, 2021, the government announced it would add Ibaraki, Tochigi, Gunma, Shizuoka, Kyoto, Hyogo, and Fukuoka prefectures to the scope of the declaration from August 20 to September 12, 2021, and also announced it would extend the declaration applicable to the six prefectures already under the declaration until September 12, 2021. On August 25, 2021, Aichi, where many of our directly-operated salons in spa facilities were located, and other seven prefectures were added to the scope from August 27 to September 12, 2021,