EXA Releases "LOADCAL® N", a Stowage Calculator Fully Compatible with NAPA Design Data
EXA Corporation has launched "LOADCAL® N," a new marine stowage and stability calculator that perfectly matches the calculation accuracy of global-standard NAPA 3D design data. By directly utilizing 3D data from the design stage, it eliminates calculation discrepancies during class approvals and drastically reduces workload. The software comes standard with compliance features for the 2026 New Grain Rules and aims to serve as the foundation for a maritime platform and autonomous shipping technologies in the future.
📋 Article Processing Timeline
- 📰 Published: May 18, 2026 at 22:00
- 🔍 Collected: May 18, 2026 at 13:31
- 🤖 AI Analyzed: May 18, 2026 at 14:05 (33 min after Collected)
EXA Corporation (Headquarters: Minatomirai, Nishi-ku, Yokohama City, Kanagawa Prefecture; Representative Director, President and Executive Officer: Yuta Hayashi; hereinafter "EXA") has released "LOADCAL® N", a new stowage calculator that achieves perfect calculation accuracy matching the global standard NAPA 3D design data. LOADCAL is a leading brand that has supported the Japanese shipbuilding and shipping industries for over 35 years, holding the top market share with an impressive track record of being installed on more than 2,500 vessels.
■ Background and Challenges
In the traditional development of stowage calculators, it was necessary to manually transcribe and reconstruct the 3D data created by ship designers into models used for stowage calculations. This process was not only inefficient but also caused slight discrepancies between the calculation results in the design phase and the stowage calculator, leading to massive workloads during class approvals and verification.
■ Features of LOADCAL N
The introduction of this solution allows the NAPA 3D models used in the design phase to be directly utilized in the stowage calculation logic.
- Perfect Match in "Design and Approval": By directly using 3D geometric data from the design phase, calculation discrepancies are reduced to zero. This drastically reduces the adjustment workload required for "number matching" during the approval process.
- Standard Support for the New Grain Rules: It comes equipped as standard with compliance judgment functions according to the revised international rules taking effect in January 2026. Rapid compliance with other international regulations (such as IACS UR L5) is also a strong point.
- Reduced Workload for Designers: Because files output from design tools can be used as-is to create LOADCAL, the workload for designers in providing information to vendors is significantly reduced.
- Revamped UI/UX: The new version of LOADCAL adopts a flat design in line with recent trends, massively improving the operability of the 3D viewer (zooming and dragging).
■ Future Developments
EXA positions the release of LOADCAL N as an important first step in building a "Maritime Platform" that digitally connects the entire lifecycle of a vessel.
- Understanding the Ship's "Now" from Land: Based on the data utilized in the design phase, and with a view to linking with future voyage data, EXA will contribute to creating an environment where ship conditions can be grasped from land. This will support safe and efficient ship operations connecting ship and shore.
- Contribution to Autonomous Navigation and Remote Operation: EXA will apply and expand the technology of this solution as a highly accurate, real-time stability and strength calculation engine, which will be indispensable for autonomous ships in the future.
- Compliance with Global Standards: By adopting the globally standard NAPA logic, EXA can meet the demands not only domestically but also from overseas shipyards and shipowners, contributing to international standardization rules.
■ Representative's Comment
Yuta Hayashi, Representative Director, President and Executive Officer, EXA Corporation
"As Digital Transformation (DX) accelerates in the maritime industry, the seamless utilization of design data for operations is an urgent challenge. We are extremely pleased to have jointly developed an industry-standard interface with NAPA, which possesses global-standard technology, and our domestic partners. As a 'Co-creation Service Integrator', EXA will fuse this new technology with our knowledge of stowage calculators cultivated over more than 35 years, contributing to the business efficiency of shipyards and shipowners, and realizing a safer operational environment."
■ Overview
Solution Name: Marine Stowage Calculator and Stability Calculator LOADCAL N
Website: https://www.exa-corp.co.jp/solutions/LOADCAL/
Target Vessels: Bulk carriers, oil tankers, LPG carriers, container ships, training/research vessels for fisheries, and MPC (Multi-Purpose) vessels.
[Company Overview]
EXA Corporation is an IT service company originating from JFE Steel, with Kyndryl Japan as its parent company. Promoting DX utilizing advanced technology, EXA comprehensively provides various services from upstream consulting to development, construction, operation, and maintenance as a "Co-creation Service Integrator". In marine solutions, it supports the IT implementation, intelligent operation, safe navigation, and marine environmental preservation of vessels using the latest IT technologies.
Website URL: https://www.exa-corp.co.jp/
■ Related Pages
NAPA Japan Ltd. Press Release URL:
https://www.napa.fi/ja/news/napa-exa-sdc-classnk_lc_api/
[Inquiries Regarding This Matter]
EXA Corporation
220-8560
Nishi-ku, Yokohama City, Kanagawa
■ Background and Challenges
In the traditional development of stowage calculators, it was necessary to manually transcribe and reconstruct the 3D data created by ship designers into models used for stowage calculations. This process was not only inefficient but also caused slight discrepancies between the calculation results in the design phase and the stowage calculator, leading to massive workloads during class approvals and verification.
■ Features of LOADCAL N
The introduction of this solution allows the NAPA 3D models used in the design phase to be directly utilized in the stowage calculation logic.
- Perfect Match in "Design and Approval": By directly using 3D geometric data from the design phase, calculation discrepancies are reduced to zero. This drastically reduces the adjustment workload required for "number matching" during the approval process.
- Standard Support for the New Grain Rules: It comes equipped as standard with compliance judgment functions according to the revised international rules taking effect in January 2026. Rapid compliance with other international regulations (such as IACS UR L5) is also a strong point.
- Reduced Workload for Designers: Because files output from design tools can be used as-is to create LOADCAL, the workload for designers in providing information to vendors is significantly reduced.
- Revamped UI/UX: The new version of LOADCAL adopts a flat design in line with recent trends, massively improving the operability of the 3D viewer (zooming and dragging).
■ Future Developments
EXA positions the release of LOADCAL N as an important first step in building a "Maritime Platform" that digitally connects the entire lifecycle of a vessel.
- Understanding the Ship's "Now" from Land: Based on the data utilized in the design phase, and with a view to linking with future voyage data, EXA will contribute to creating an environment where ship conditions can be grasped from land. This will support safe and efficient ship operations connecting ship and shore.
- Contribution to Autonomous Navigation and Remote Operation: EXA will apply and expand the technology of this solution as a highly accurate, real-time stability and strength calculation engine, which will be indispensable for autonomous ships in the future.
- Compliance with Global Standards: By adopting the globally standard NAPA logic, EXA can meet the demands not only domestically but also from overseas shipyards and shipowners, contributing to international standardization rules.
■ Representative's Comment
Yuta Hayashi, Representative Director, President and Executive Officer, EXA Corporation
"As Digital Transformation (DX) accelerates in the maritime industry, the seamless utilization of design data for operations is an urgent challenge. We are extremely pleased to have jointly developed an industry-standard interface with NAPA, which possesses global-standard technology, and our domestic partners. As a 'Co-creation Service Integrator', EXA will fuse this new technology with our knowledge of stowage calculators cultivated over more than 35 years, contributing to the business efficiency of shipyards and shipowners, and realizing a safer operational environment."
■ Overview
Solution Name: Marine Stowage Calculator and Stability Calculator LOADCAL N
Website: https://www.exa-corp.co.jp/solutions/LOADCAL/
Target Vessels: Bulk carriers, oil tankers, LPG carriers, container ships, training/research vessels for fisheries, and MPC (Multi-Purpose) vessels.
[Company Overview]
EXA Corporation is an IT service company originating from JFE Steel, with Kyndryl Japan as its parent company. Promoting DX utilizing advanced technology, EXA comprehensively provides various services from upstream consulting to development, construction, operation, and maintenance as a "Co-creation Service Integrator". In marine solutions, it supports the IT implementation, intelligent operation, safe navigation, and marine environmental preservation of vessels using the latest IT technologies.
Website URL: https://www.exa-corp.co.jp/
■ Related Pages
NAPA Japan Ltd. Press Release URL:
https://www.napa.fi/ja/news/napa-exa-sdc-classnk_lc_api/
[Inquiries Regarding This Matter]
EXA Corporation
220-8560
Nishi-ku, Yokohama City, Kanagawa
FAQ
What is the key feature of LOADCAL N?
It directly utilizes NAPA 3D design data for stowage logic, eliminating calculation discrepancies between design and approval stages.
Does it comply with the New Grain Rules?
Yes, it comes standard with compliance judgment functions for the revised international rules effective January 2026.
What types of vessels are supported?
Supported vessels include bulk carriers, oil tankers, LPG carriers, container ships, training/research vessels, and MPCs.