Question: What is the range of lives lost during the Sook Ching massacre?
About the article "Singapore", section "History".

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In 1942, 400 Chinese civilians were massacred here as part of the Sook Ching Massacre.
The place has been declared as a national heritage site.
There is a plaque commemorating this incident.
The area was known as Kangkar back then.
Kangkar means "river mouth" in Teochew. 
In Malaya and Singapore, the Imperial Guard was involved in several notorious Japanese war crimes such as the Parit Sulong Massacre and the Sook Ching massacre.
Lieutenant General Takuma Nishimura, who was sentenced to life imprisonment by a British military court in relation to the Sook Ching killings, was later convicted of war crimes by an Australian Military Court in relation to the Parit Sulong massacre.
He was executed by hanging on June 11, 1951. 
The Sook Ching (, meaning "purge through cleansing") was a systematic extermination of perceived hostile elements among the Chinese in Singapore by the Japanese military during the Japanese occupation of Singapore, after the British colony surrendered on 15 February 1942 following the Battle of Singapore.
The Sook Ching operation, which was overseen by the "Kempetai", was later extended to include the Chinese in Malaya as well.
The massacre took place from 18 February to 4 March 1942 at various places in the region.
The "Sook Ching" was referred to as the "Kakyōshukusei" (), "purging of Chinese") by the Japanese.
The Japanese also referred to it as the "Shingapōru Daikenshō" (), literally "great inspection of Singapore".
Singapore's National Heritage Board uses the term "Sook Ching" in its publications.
The memories of those who lived through that period have been captured at exhibition galleries in the Old Ford Motor Factory at Bukit Timah, the site of the former factory where the British surrendered to the Japanese on 15 February 1942.
The current Japanese term for the massacre is "Shingapōru Kakyōgyakusatsujiken" (), literally "(the) Singapore Chinese massacre".
There is no dispute in scholarly circles that the massacre took place, but Japanese and Singaporean sources disagree about the death toll.
According to Hirofumi Hayashi (see next section), the Japanese Ministry of Foreign Affairs "accepted that the Japanese military had carried out mass killings in Singapore ... During negotiations with Singapore, the Japanese government rejected demands for reparations but agreed to make a “gesture of atonement” by providing funds in other ways."
Historically, the Neil Road site and the present site were near two of the places used to gather and screen Chinese men aged 18 to 55 for the Sook Ching massacre in 1942: the present Police Cantonment Complex, and the area between Singapore General Hospital and Tiong Bahru Road. 
Life during the occupation.
Reign of terror.
The "Kempeitai" (the Japanese military secret police), committed numerous atrocities against the common people.
They introduced the system of "Sook Ching", which means "purge through purification" in Chinese, to get rid of those deemed to be anti-Japanese.
The Sook Ching Massacre claimed the lives of between 25,000 and 50,000 ethnic Chinese in Singapore and Malaya.
These men were rounded up and taken to deserted spots around the island and killed systematically.
Moreover, the "Kempeitai" established a network of informers around the island to help them identify those who resisted.
These informers were well-paid by the "Kempeitai" and had no fear of being arrested.
Japanese soldiers patrolled the streets and commoners had to bow to them when they passed by.
Those who failed to do so would be slapped or beaten and some people would be taken away.