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Update Japanese translation for PR #121

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@@ -426,7 +426,7 @@ Before we jump into the inner workings of a generic codec, let's look back to un
The video codec [H.261](https://en.wikipedia.org/wiki/H.261) was born in 1990 (technically 1988), and it was designed to work with **data rates of 64 kbit/s**. It already uses ideas such as chroma subsampling, macro block, etc. In the year of 1995, the **H.263** video codec standard was published and continued to be extended until 2001.
In 2003 the first version of **H.264/AVC** was completed. In the same year, **On2 Technologies)** (formerly known as the Duck Corporation) released their video codec as a **royalty-free** lossy video compression called **VP3**. In 2008, **Google bought** this company, releasing **VP8** in the same year. In December of 2012, Google released the **VP9** and it's **supported by roughly ¾ of the browser market** (mobile included).
In 2003 the first version of **H.264/AVC** was completed. In the same year, **On2 Technologies** (formerly known as the Duck Corporation) released their video codec as a **royalty-free** lossy video compression called **VP3**. In 2008, **Google bought** this company, releasing **VP8** in the same year. In December of 2012, Google released the **VP9** and it's **supported by roughly ¾ of the browser market** (mobile included).
**[AV1](https://en.wikipedia.org/wiki/AOMedia_Video_1)** is a new **royalty-free** and open source video codec that's being designed by the [Alliance for Open Media (AOMedia)](http://aomedia.org/), which is composed of the **companies: Google, Mozilla, Microsoft, Amazon, Netflix, AMD, ARM, NVidia, Intel and Cisco** among others. The **first version** 0.1.0 of the reference codec was **published on April 7, 2016**.