Ocean Spiral has been dreamt up by the Japanese Shimizu Corporation.

" 海洋螺旋" 由日本清水建设公司设计。

Another interesting concept was developed by a Japanese company called the Shimizu Corporation.

另一个有趣的概念是由一家名为清水公司的日本公司提出的。

This visit is Shimizu's first return to Chinese soil in 79 years.

时隔79年，清水英男首次回到中国。

On Aug 14, 1945, Shimizu fled China with the retreating Japanese forces.

1945年8月14日，清水随撤退的日军逃离中国。

Shimizu recalled the day when he was taken to the herbarium inside the lab complex.

清水回忆起他被带到实验室大楼内标本室的那一天。

Here's Shimizu engineer, Maksaki Takeuchi, explaining to BBC World Service programme, CrowdScience, the motivation behind the idea.

以下是清水集团的工程师竹内真崎向 BBC 世界服务节目《大众科学》解释这个想法背后的动机。

One Japanese company, Shimizu, already has that covered.

一家日本公司 Shimizu 已经涵盖了这一点。

" Historical facts cannot be covered up, " Shimizu wrote in a signed article published on Monday in People's Daily.

清水在人民日报发文《历史事实不容掩盖》：“历史事实不容掩盖。

After returning to Japan, Shimizu was haunted by the guilt of what he saw and what he was forced to participate in.

回到日本后，那地狱般的景象一直在他的脑中挥之不去。

Shimizu was about 14 years old and among the last batches of Unit 731 Youth Corps members when he was sent to Harbin in March 1945.

1945 年 3 月，清水英男大约14岁，是731部队“少年队”最后一期的成员。

In 2016, Shimizu revealed his identity as a former Unit 731 member and began to expose the atrocities of the Japanese Imperial Army through public speeches and interviews, aiming to tell historical truths.

2016年，清水英男公布了自己曾是731部队“少年队”队员的身份，此后便不断通过公共演讲和采访，致力于向公众揭露侵华日军的暴行，还原历史真相。

On Saturday, before departure from his home in Nagano prefecture, Shimizu told Xinhua News Agency that it was his " first return to China in 79 years" and he had two wishes.

8月10日，清水在离开长野县的家中之前告诉新华社，“时隔79年重返中国，”清水说自己有两个心愿。

But as yet, Shimizu Corporation's plans for an underwater city are still in the planning stages - no part of the project has yet been built and the total cost is thought to exceed 26 billion dollars.

但到目前为止，清水公司的水下城市计划仍处于规划阶段——项目尚未完成，而且总成本被认为将超过260亿美元。

After 79 years, Shimizu, who is now 94, returned to Harbin, where Unit 731 was once located, to expose and testify to the crimes committed by his detachment during the War of Resistance Against Japanese Aggression (1931-45).

时隔79年，现年94岁的清水英男重返让他背负一生沉重记忆的原点——位于中国哈尔滨的侵华日军第七三一部队旧址（现为侵华日军第七三一部队罪证陈列馆），揭发731部队在抗日战争（1931-1945）期间犯下的罪行。