A Gunpla hobbyist known as Judo Asumi has completed a custom “Full Armor Hyaku Shiki High Mobility Equipment” modification based on the HGUC Hyaku Shiki kit. The project, shared via the GUNSTA platform, focuses on a “romance modification” that emphasizes high mobility and offensive power, featuring a dual-rifle configuration designed to outmaneuver and eliminate enemy targets.
Technical Specifications of the Full Armor Hyaku Shiki Custom
The build utilizes the High Grade Universal Century (HGUC) line of the Hyaku Shiki, a mobile suit originally appearing in the Zeta Gundam series. According to the creator’s notes on GUNSTA, the primary objective of this specific modification was to enhance the suit’s armament without sacrificing the aesthetic of a high-mobility unit.

The central design philosophy for this version is “confusing the enemy with mobility and destroying them with two rifles.” This tactical setup deviates from the standard single-beam rifle loadout, opting instead for a symmetrical dual-wielding approach that increases the volume of fire available to the pilot.
The “Romance Modification” Philosophy
Judo Asumi describes the project as a “romance modification” (roman kaizo), a term common in the Japanese modeling community. In this context, it refers to modifications driven by personal passion and imaginative “what-if” scenarios rather than strict adherence to official technical manuals or canon lore. Asumi, identifying as a 50-year-old enthusiast, utilized this approach to realize a vision of the Hyaku Shiki that blends heavy armor with agile performance.
For those unfamiliar with the term, “romance” in Gunpla often signifies a build that prioritizes the “cool factor” or a specific thematic dream—such as adding excessive weaponry to a sleek frame—over historical accuracy to the anime series.
Analysis of the HGUC Hyaku Shiki Platform
The HGUC Hyaku Shiki serves as a versatile base for such modifications due to its iconic gold plating and balanced proportions. By adding “Full Armor” elements, the builder transforms the suit from a versatile general-purpose mobile suit into a specialized heavy-hitter. The addition of high-mobility equipment typically involves augmenting the thruster arrays and adding armor plating to protect the suit during high-speed engagements.

The use of two rifles suggests a shift in the suit’s combat role, moving from a balanced skirmisher to a high-output attacker. This configuration allows for continuous fire cycles, as the pilot can alternate between weapons or fire simultaneously to overwhelm enemy defenses.
The Role of GUNSTA in the Modeling Community
The work was published on GUNSTA, a specialized social platform operated by Bandai Namco. The site allows Gunpla builders to showcase their portfolios, share technical progress, and connect with other enthusiasts. By documenting the completion of the additional weaponry, Asumi contributes to a broader ecosystem of community-driven design where “kit-bashing” (combining parts from different kits) and custom sculpting are celebrated.
This specific project highlights the enduring appeal of the Universal Century timeline, where the Hyaku Shiki remains one of the most modified units in the hobby due to its distinct visual identity and the prestige associated with its gold finish.
For further updates on custom builds and official kit releases, enthusiasts typically monitor the Bandai Hobby official channels and community galleries like GUNSTA.
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