HTV-X 1, 2, 3 (Kotonotori 1, 2, 3) - Gunter's Space Page

JAXA decided in 2015 to devlop an improved, cost-reduced version of the HTV uncrewed non-reusable cargo spacecraft, which is preliminary called HT

HTV-2

Specifications, New unmanned cargo transfer spacecraft (HTV-X)

Transfer Vehicle JAXA Human Spaceflight Technology Directorate

Specifications, New unmanned cargo transfer spacecraft (HTV-X)

HTV Spacecraft Information – Spacecraft & Satellites

File:HTV-1 Propulsion Module.jpg - Wikimedia Commons

New unmanned cargo transfer spacecraft (HTV-X)

HTV-1 Encyclopedia MDPI

Spaceflight Now, HTV Mission Report

Redesigned HTV：HTV-X

HTV-3

H-II Transfer Vehicle - Wikipedia

HTV-3