High Resolution Radiosonde data from JMA

This data is also available at GISC Tokyo Portal.  Note that the category is "Empty or Invalid" for technical limitation.

IUKC60 example:
https://www.wis-jma.go.jp/data/browse?ContentType=HTML&Indicator=RJTD&LinkText=IUKC60

--- WMO Operational Newsletter ---

Notification from Japan Meteorological Agency (JMA)
As from 05 July 2018, JMA will begin to distribute High Resolution Radiosonde data in WMO official BUFR template TM309052 and the sequence 3 01 128 under the WMO headers IU[K,S]C[60-75] RJTD.

 The current TEMP BUFR messages converted from TAC reports, distributed under the headers IUSC[01-12] RJTD, will terminate after the migration to the bulletins for the users.

Japan High Resolution Radiosonde data reports / FM94 BUFR:

TTAAii CCCC WMO Station Index Number
IU[K,S]C60 RJTD 47401 (WAKKANAI)
IU[K,S]C61 RJTD 47412 (SAPPORO)
IU[K,S]C62 RJTD 47418 (KUSHIRO)
IU[K,S]C63 RJTD 47582 (AKITA)
IU[K,S]C64 RJTD 47600 (WAJIMA)
IU[K,S]C65 RJTD 47646 (TATENO)
IU[K,S]C66 RJTD 47678 (HACHIJOJIMA)
IU[K,S]C67 RJTD 47741 (MATSUE)
IU[K,S]C68 RJTD 47778 (SHIONOMISAKI)
IU[K,S]C69 RJTD 47807 (FUKUOKA)
IU[K,S]C70 RJTD 47827 (KAGOSHIMA)
IU[K,S]C71 RJTD 47909 (NAZE/FUNCHATOGE)
IU[K,S]C72 RJTD 47918 (ISHIGAKIJIMA)
IU[K,S]C73 RJTD 47945 (MINAMIDAITOJIMA)
IU[K,S]C74 RJTD 47971 (CHICHIJIMA)
IU[K,S]C75 RJTD 47991 (MINAMITORISHIMA)
 
Published: 11 June 2018

http://www.wmo.int/pages/prog/www/ois/Operational_Information/Newsletters/current_news_en.html