Yield and Grain Quality of Japanese Rice Cultivars in Hawaii and Japan, 2025

A comparative analysis of two Japanese rice cultivars, Koshihikari and Hitomebore, grown under upland conditions in Hawaii and Japan during the 2025 summer growing season. The dataset likely contains measurements of grain yield, growth duration, spikelet number, grain-filling rate, thousand-grain weight, whole grain ratio, and incidence of white immature grains. It was authored by Sotaro Honda and shared on figshare under a CC-BY-4.0 license.

Use Cases

• Compare rice yield potential between Hawaii and Japan based on the reported grain yield data.
• Analyze the relationship between environmental factors and grain quality based on the described solar radiation and temperature associations.
• Model compensation mechanisms in yield components based on the described trade-offs between spikelet number, grain-filling rate, and thousand-grain weight.
• Assess the feasibility of upland rice cultivation in new regions based on the agronomic performance metrics.

Strengths

• Provides specific yield data for two cultivars, with Koshihikari and Hitomebore yields reported as 3.79–4.01 t ha⁻¹ in Hawaii and 3.89–4.16 t ha⁻¹ in Japan.
• Includes comparative metrics for grain quality, such as whole grain ratio and incidence of white immature grains.
• Data is from a controlled field experiment conducted in a specific time frame (2025 summer growing season).

Limitations

• The dataset is described in a PDF report (415.7 KB); the underlying structured data (e.g., column-level data) is not directly available.
• Row count is unknown, which may limit suitability assessment for statistical modeling.
• The study focuses on only two cultivars and one growing season, limiting generalizability.

Provenance

Source

figshare, author Sotaro Honda.

Collection Method

Field experiment evaluating agronomic performance under direct-seeded upland conditions.

Time Range

2025 summer growing season.

Freshness

Last updated 2026-05-04 05:32:45; freshness should be verified.

Geography

Hawaii and Japan.