Japanese investors SoftBank Group will buy two firms that build walking robots from Alphabet Inc. which would add to the group’s growing artificial intelligence portfolio.

As namely Boston Dynamics and Tokyo-based Schaft, which design and manufacture robots that simulate human movement. It did not disclose the terms of the transactions.

SoftBank’s shares rose as much as 7.9 percent after the deal was announced, hitting a 17-year high. As Smart robotics are going to be a key driver of the next stage of the information revolution, SoftBank Group Chairman Masayoshi Son is convinced that the two choices are his best bet.

SoftBank and some big investment companies have embarked an aggressive acquisition campaign to boost  its research and development capabilities.While this paticular group has the backing of $93  billion Vision Fund, the world’s largest private equity fund, it seeks to invest in technologies expected to grow significantly in the near future, such as robotics and artificial intelligence.

Son, Japan’s richest man, describes the fund as essential for setting up SoftBank at the helm driving the economy's growth as it increasingly becomes digitized.

Boston Dynamics, till date has produced a number of robots that mimic human and  animal movement including Atlas, a humanoid model that co-ordinates  motion and balance using its arms and legs and can pick itself up off  the ground when knocked over.

It is best known for building robots that look as if they belong in  science-fiction movies and are often co-developed or funded by the U.S.  military. Its military projects would mean the acquisition is likely to  be subject to regulatory approval from Committee on Foreign Investment  in the United States.

The company was acquired by Google in 2013 during a robotics shopping  spree led by Android creator Andy Rubin, however, the team suffered a set back within the tech giant after Rubin’s departure, former Boston Dynamics employees feel.