Sony is currently running the "α Full-Frame Mirrorless Autumn Campaign" and the "α Startup Autumn Campaign," offering cashback of up to 40,000 yen (about 270 USD) on the purchase of eligible cameras, lenses, and other items. Here is the campaign overview as posted on the official site (α Full-Frame Mirrorless Autumn Campaign):

Under the α Full-Frame Mirrorless Autumn Campaign (the "Campaign"), customers who purchase eligible products during the campaign period and submit a valid application within the application period in accordance with our designated procedures will receive cashback in the amount specified for each eligible product. (Official site)

Both campaigns cover purchases made between Friday, August 30, 2019 and Monday, September 30, 2019. The application requires you to cut out the barcode portion of the outer box and mail it in, so be careful if you plan to sell the item used in the future. Copies of the receipt and warranty card are also required, so be sure not to throw them away. For more details on the campaign, please see the official site:
α Startup Autumn Campaign | Sony
Express Endless Possibilities — α Full-Frame Mirrorless Autumn Campaign | Sony

30,000 Yen Cashback Eligible

α9 Body (ILCE-9)

[amazon_link asins='B071KWV9PZ' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

α7R III Body (ILCE-7RM3)

[amazon_link asins='B07718K1B6' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

α7R II Body (ILCE7RM2)

[amazon_link asins='B0144AK71I' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

20,000 Yen Cashback Eligible

α7 II Body (ILCE-7M2)

[amazon_link asins='B00PVHO6O8' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

15,000 Yen Cashback Eligible

α6400 Double Zoom Lens Kit (ILCE-6400Y)

[amazon_link asins='B07MYZ5P44' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

α6400 High-Power Zoom Lens Kit (ILCE-6400M) Black only

[amazon_link asins='B07MYZ1PZK' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

10,000 Yen Cashback Eligible

α7 II Zoom Lens Kit (ILCE-7M2K)

[amazon_link asins='B00U38J7IK' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

α6400 Power Zoom Lens Kit (ILCE-6400L)

[amazon_link asins='B07MYZQ67Q' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

α6400 Body (ILCE-6400)

[amazon_link asins='B07MYWZSFT' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

[G Master] SEL2470GM

[amazon_link asins='B01C2UO6XC' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

[Other FE Lenses] SEL24240

[amazon_link asins='B00U29GNC8' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']

[G Lenses] SEL1224G / SEL24105G / SEL70200G / SEL70300G / SEL90M28G

[Zeiss Lenses] SEL1635Z / SEL2470Z / SEL50F14Z / SEL55F18Z

5,000 Yen Cashback Eligible

HVL-F60RM

[amazon_link asins='B07B4J9N5Y' template='Default' store='pianix3870-22' marketplace='JP' link_id='653f0409-fa01-11e8-a70b-63a463ade486']