Kanthaswamy Balasubramaniam
They did and still do for 47% of their Domestic Market.
For a Long time - the Japanese had their own brands like NTT Docomo which had a Global Share in cellphones

他们过去尝试过现在仍占据其国内市场份额的47%。  
长期以来,日本拥有自己的手机品牌,例如NTT Docomo,这些品牌在全球手机市场中曾占有一定份额。

Back in those days - Motorola (USA), Alcatel (France) and Docomo (Japan) controlled the Cellphone market which was to be frank quite limited to developed countries and unheard of in developing countries

在过去那个年代,摩托罗拉(美国)、阿尔卡特(法国)和Docomo(日本)主导着手机市场——坦率地说,当时手机市场仅限于发达国家,在发展中国家几乎闻所未闻。

Then suddenly The European Brands like Nokia , Ericcson and Siemens surged ahead especially Nokia with innovative designs and efficient production costs. Nokia was among the earliest phone manufacturers to migrate to China and manufacture 14%, then upto 65% of their handsets from China.

随后,诺基亚、爱立信和西门子等欧洲品牌迅速崛起,尤其是诺基亚,凭借创新的设计和高效的生产成本脱颖而出。诺基亚是最早将生产基地迁往中国的手机制造商之一,最初14%的手机在中国生产,后来上升到65%。

In doing so Nokia jumpstarted and began to make excellent phones at lower prices
The 3310 Model of Nokia was the largest selling mobile phone in the world in 2001

通过此举,诺基亚迅速启动并开始以更低的价格制造出优秀的手机。2001年,诺基亚3310成为全球销量最高的手机型号。

Japan found production of cellphones to be expensive and untenable exactly like USA found wrt Motorola. They too migrated manufacture to the East but they were a bit behind and their designs were not as efficient as Nokias.

日本发现手机生产成本高昂,难以持续,这与美国摩托罗拉的情况如出一辙。他们也逐渐将制造转移到东方,但行动稍晚,且设计效率不如诺基亚。

Still US and Japanese brands still dominated their domestic economies.
Japan even in 2006 had over 75% of their Domestic Market controlled by NTT Docomo or Sony - Ericcson or other Japanese Brands.

尽管如此,美国和日本品牌在其本国市场仍占据主导地位。即使到了2006年,日本国内市场仍有超过75%的份额由NTT Docomo、索尼-爱立信或其他日本品牌掌控。

Realizing that they were a bit too late to the game and that production of cellphones required numbers & low costs & space, Japan slowly and steadily reduced pumping money into R&D on Cellphone related technology and moved into Robotics and other areas like Aeronautics and Hydrogen Powered Vehicles.

日本逐渐意识到自己已落后一步,而手机生产需要大规模、低成本和广阔空间,因此他们缓慢而稳定地减少了对手机相关技术研发的投入,转而将重点投向机器人、航空航天和氢能源汽车等领域。

Even so - China was nowhere in the picture.
Technologies slowly came up one after another
Samsung began to overtake Nokia with their Color Display superiority and in doing so developed a huge market lead.
HP, O2, Palm all came up with initial microprocessor based PDAs but they all fluffed on a global basis and Samsung surged ahead
Finally Apple came up with the Iphone and its processor and its application as a mini computer with earliest Apps

即便如此,中国当时还未进入这一领域。
随后,一项又一项新技术相继出现。
三星凭借其彩色显示屏的优势开始超越诺基亚,并借此建立了巨大的市场领先地位。
惠普(HP)、O2、Palm等公司曾推出基于微处理器的早期PDA设备,但都在全球范围内失败了,而三星则继续领先。
最终,苹果推出了iPhone,搭载其自研处理器,并将其定位为带有早期应用程序的微型计算机。

All this while Japan continued to make Cellphones but it was entirely for their own market. Even here Samsung and Apple began to make huge inroads.
China entered the frey only when they started building near same quality smartphones at much lower prices - taking advantage of the tariffs and the brand disadvantages of apple and samsung.
Then they pumped more and more money into Research and Development on Smartphones and grabbed a larger and larger market share.

在此期间,日本仍在制造手机,但完全局限于国内市场。即便如此,三星和苹果也开始大举进入日本市场。
中国是在开始以远低于苹果和三星的价格制造出接近同等质量的智能手机后才真正进入这一领域的——他们利用了关税优势以及苹果和三星的品牌劣势。
随后,中国不断加大对智能手机研发的投入,逐步抢占了越来越大的市场份额。

Thus Japan gave up on the Smartphone race
They didnt spend much on R&D post 2001 rather diverting most of the spending to Robotics & Hydrogen Powered Engines & Nuclear Related stuff.
They couldnt produce at the same costs or same volumes or numbers as the Chinese. So they couldnt globally compete. Others like Apple had already moved to China and had a big head start in production
So they couldnt even develop any cutting edge technological advantage like Samsung, Apple etc came up with as a major selling point.

因此,日本实际上放弃了智能手机的竞争。
他们在2001年后并未在研发上投入太多资金,而是将大部分支出转向了机器人、氢能源发动机和核能相关技术。  
他们无法像中国企业那样实现低成本、大规模的生产,因此无法在全球竞争。像苹果等公司早已将产线迁至中国,生产上已占据巨大先机。  
同时,他们也无法像三星、苹果那样开发出具有突破性的核心技术作为主要卖点。