Phone data

Phone Sim for Japan

The following options were all considered - obviously these prices and providers will vary each year :

Link

Data Allowance

Max Speed

Cost

Duration

Limitations

Extras

http://www.so-net.ne.jp/prepaid/en/3gbLTE 225 Mbps6500 YEN60 days rechargable
NTT http://prepaidsim.jp/index.htmlunlimitedLTE 262.5Mbps3,780 YEN14 days100mb/day 
https://t.iijmio.jp/en/2gbLTE 225 Mbps3700 yen3 months rechargable
http://www.traveljapan.com.au/japandatasim
http://japan.globalbroadband.com.au/ 
3gbLTE 225 Mbpsau$4930 days rechargable, 1200y=1.5gb
http://www.comst.jp/products/detail.php?product_id=413gbLTE 225 Mbps3780 yen30 days  
http://www.bmobile.ne.jp/english/4gbLTE 225 Mbps2,204yen (excluding tax) 14 daysmay take 4-14 days delivery 
https://www.econnectjapan.com/pricing3gb3g5480 yen30 days rechargeable
http://www.datago.co/japan-sim.html3gbLTE 225 Mbpsau$6930 days 1gb topups
http://travelsimsdirect.com/product-category/japan/docomo/?country_option=205unlimitedLTE 225 Mbpsau$6514 daysFirst 200mb of each day at 4G speeds followed by unlimited 3G data 
http://jnto.org.au/wi-ho-prepaid-sim-card-is-now-available-for-visitors-to-japan/3gbLTE 225 Mbps6500yen30 days recharge 1GB: 1,980 yen