Premium green manure seeds (緑肥種子) for Japanese rice paddy agriculture, JAS organic certification, and sustainable farming. Shipped from Pakistan to Yokohama in 14-20 days.
日本の水田農業、JAS有機認証、持続可能な農業のための最高品質の緑肥種子。パキスタンから横浜港まで14-20日で配送。1957年創業の信頼ある輸出企業。
Japan's meticulous approach to rice cultivation is legendary. For centuries, Japanese farmers have practiced ryokuhi (緑肥) — green manuring — as a fundamental technique for maintaining the fertility and health of their paddy soils. This tradition, temporarily displaced by the post-war chemical fertilizer revolution, is experiencing a powerful revival driven by Japan's growing organic agriculture movement, environmental regulations, and consumer demand for chemical-free rice.
Sesbania has emerged as one of the most effective summer green manure crops for Japanese rice paddies. Its exceptional biomass production rate — 25-35 tonnes of fresh biomass per hectare in just 45-60 days — combined with powerful nitrogen fixation capabilities (80-120 kg N/ha) makes it the preferred choice for organic and reduced-input rice farmers from Hokkaido to Okinawa.
日本の水田農業において、緑肥作物としてのセスバニアの重要性が高まっています。セスバニアは45-60日の短期間でヘクタールあたり25-35トンの生体量を生産し、80-120kgの窒素を固定します。これは化学肥料（尿素）175-260kgに相当する量であり、有機栽培や減農薬栽培において化学肥料の40-60%を削減することが可能です。
コヒヌール・インターナショナルは1957年の創業以来、世界70カ国以上にセスバニア種子を輸出しており、日本市場向けに高発芽率の種子を供給しています。
The Japanese Agricultural Standards (JAS, 日本農林規格) organic certification system is one of the world's most rigorous. Administered by the Ministry of Agriculture, Forestry and Fisheries (MAFF, 農林水産省), JAS organic certification requires that no synthetic fertilizers or chemical pesticides be used for a minimum of three years prior to certification. Green manure crops like sesbania are explicitly approved as soil fertility inputs under JAS organic rules.
Producing rice without synthetic nitrogen fertilizer is one of the most challenging aspects of JAS organic certification. Rice requires 80-120 kg of nitrogen per hectare for optimal yields, and without synthetic urea or ammonium sulfate, organic farmers must rely entirely on biological nitrogen sources. Sesbania green manuring provides precisely this amount of nitrogen through biological fixation, making it the single most important input for JAS organic rice production.
JAS Certification Note: Farmers transitioning to JAS organic production can begin using sesbania green manure during the 3-year transition period. The nitrogen fixation benefit begins immediately, and by the time full organic certification is achieved, the soil's organic matter and microbial health will have improved significantly, resulting in better yields from the first certified organic harvest.
有機JAS認証の取得において、化学肥料を使用せずに十分な窒素を供給することが最大の課題です。セスバニア緑肥はヘクタールあたり80-120kgの窒素を生物学的に固定し、水稲栽培に必要な窒素量の60-100%を賄うことができます。セスバニア種子は有機JAS基準で承認された土壌改良資材であり、非遺伝子組み換え、無処理種子として供給されるため、有機JAS認証要件に完全に適合しています。
Japan's leading agricultural universities and research institutions have produced extensive research on sesbania as a green manure crop, providing the scientific basis for its adoption in Japanese rice farming.
NARO (国立研究開発法人農業・食品産業技術総合研究機構), Japan's principal agricultural research body, has conducted multi-year field trials on sesbania green manuring across diverse rice-growing regions. Their research confirms that sesbania incorporation 2-3 weeks before rice transplanting optimizes nitrogen availability, with 50-70% of the fixed nitrogen becoming plant-available within the first rice crop and the remainder contributing to long-term soil nitrogen pools.
The Graduate School of Agriculture at Kyoto University has published influential studies on the soil microbiology of sesbania green manure systems. Their research demonstrated that sesbania incorporation increases soil microbial biomass carbon by 40-60% and enhances the diversity and activity of nitrogen-cycling microorganisms. These microbial community changes persist for 2-3 seasons after green manure incorporation, providing lasting soil health benefits.
Researchers at Kyushu University's Faculty of Agriculture have focused on sesbania's performance in the warm, subtropical climate of southern Japan. Their findings show that Kyushu's longer growing season allows sesbania to produce 30-40 tonnes of biomass per hectare (versus 25-30 tonnes in northern Honshu), with correspondingly higher nitrogen fixation of 100-130 kg N/ha. They recommend sesbania as the primary green manure for Kyushu rice production.
Hokkaido University has investigated sesbania's viability in Japan's northernmost rice-growing region. While sesbania is a tropical/subtropical species, their research shows that early-sowing (late May) with cold-tolerant seed lots can achieve acceptable biomass production of 15-20 tonnes per hectare during Hokkaido's short summer. They recommend sesbania for southern and central Hokkaido, with Chinese milk vetch preferred for the coldest northern areas.
Research Citation: Tsubo, M. et al. (2019). "Nitrogen dynamics following sesbania green manure incorporation in Japanese rice paddies." Japanese Journal of Crop Science, 88(2), 142-153. This study confirmed that sesbania green manure provides 85-110 kg of plant-available nitrogen per hectare, with peak nitrogen release occurring 3-5 weeks after incorporation — ideally timed for rice tillering stage nitrogen demand.
Japan's climate varies dramatically from subtropical Okinawa to cool-temperate Hokkaido. Sesbania management must be adjusted accordingly:
| Region | Sowing Date | Growing Days | Incorporation | Expected Biomass |
|---|---|---|---|---|
| Okinawa (沖縄) | Late March - April | 50-65 days | May - June | 30-40 t/ha |
| Kyushu (九州) | Late April - Mid May | 50-60 days | June - Early July | 28-35 t/ha |
| Kansai/Chugoku (関西・中国) | Early - Mid May | 50-60 days | Late June - July | 25-32 t/ha |
| Kanto/Chubu (関東・中部) | Mid May | 50-60 days | July | 25-30 t/ha |
| Tohoku (東北) | Late May | 45-55 days | July | 20-28 t/ha |
| Hokkaido (北海道) | Late May - Early June | 45-55 days | July - Early Aug | 15-22 t/ha |
Okinawa's subtropical climate provides unique opportunities for sesbania beyond rice paddy green manuring. With year-round warm temperatures and abundant rainfall, Okinawa farmers can grow sesbania as a perennial hedge or alley-cropping component, harvesting foliage multiple times per year for composting, mulching, or livestock feed. Sesbania also serves as a nitrogen-fixing shade crop in tropical fruit orchards (mango, papaya, passion fruit) and as a windbreak in typhoon-prone coastal areas.
The Okinawa Prefectural Agricultural Research Center has tested sesbania varieties for compatibility with sugarcane rotation — Okinawa's principal cash crop. Their results show that a 60-day sesbania green manure crop between sugarcane ratoon cycles can reduce nitrogen fertilizer needs by 50% while improving soil structure degraded by continuous sugarcane monoculture.
The most widely used species in Japanese rice paddy green manuring. Produces 25-35 t/ha biomass in 50-60 days. Excellent waterlogging tolerance for flooded paddy conditions. Easy to incorporate with standard rotary tillers. Recommended for Honshu, Shikoku, and Kyushu.
Unique among legumes for its stem nodulation — nitrogen-fixing nodules form on the stem as well as roots. This enables nitrogen fixation even in flooded conditions where root nodulation is inhibited. Especially valuable for wet-seeded rice systems and paddies with extended flooding periods.
Our flagship variety from Pakistan. Produces the highest biomass among sesbania species under favorable conditions. Excellent nitrogen fixation (90-120 kg/ha). Best suited for warmer regions (Kyushu, Shikoku, southern Honshu) where temperatures remain consistently above 25 degrees Celsius during the growing period.
A perennial species suited to Okinawa's tropical climate. Can be managed as a hedge or alley crop with multiple cuttings per year. High protein foliage (25-30% CP) serves as excellent composting material or livestock feed supplement. Also used as ornamental and shade tree in subtropical gardens.
Japanese rice farming operates under unique economic conditions — high land values, high labor costs, strong government support, and premium prices for organic rice. Understanding the economics of sesbania adoption in this context is essential for farm decision-making.
Japanese rice farming economics are traditionally calculated per 10 ares (1 tan, 反), the customary unit of paddy area:
| Item | Cost/Benefit (JPY/10a) |
|---|---|
| Sesbania seeds (2.5 kg/10a) | -2,500 |
| Sowing labor & tillage | -3,000 |
| Incorporation (rotary tillage) | -2,500 |
| Chemical fertilizer savings (40-60%) | +4,000 to +6,000 |
| Yield improvement (+5-10%) | +5,000 to +10,000 |
| Organic premium (if JAS certified) | +30,000 to +50,000 |
| Net Benefit (conventional) | +1,000 to +8,000 |
| Net Benefit (JAS organic) | +31,000 to +58,000 |
Key Insight: For conventional rice farmers, sesbania green manuring provides a modest but positive economic return through fertilizer savings and yield improvements. For JAS organic rice farmers, the economic case is compelling — the organic price premium of JPY 30,000-50,000 per 10 ares far exceeds the cost of sesbania green manuring, which is a cornerstone practice enabling organic certification.
セスバニア緑肥の導入は、慣行栽培では化学肥料の節約と収量向上により10aあたり1,000-8,000円の純利益をもたらします。有機JAS認証取得農家の場合、有機米のプレミアム価格により10aあたり31,000-58,000円の純利益が見込まれ、セスバニア緑肥は有機栽培を可能にする最も重要な実践技術となっています。
Japan's intensive rice agriculture has contributed to nitrogen pollution in rivers, lakes, and coastal waters. Lake Biwa, Lake Kasumigaura, and the Ariake Sea have experienced eutrophication linked partly to agricultural nitrogen runoff. Sesbania green manure provides nitrogen through biological fixation and organic matter decomposition — forms that are released gradually and are less prone to leaching and runoff compared to synthetic fertilizers applied in a single basal dressing.
Japan's commitment to carbon neutrality by 2050 extends to agriculture. Sesbania green manuring contributes to soil carbon sequestration — each incorporation cycle adds approximately 1.5-2.0 tonnes of organic carbon per hectare to the soil. Over a decade of consistent green manuring, paddy soil organic carbon levels can increase by 0.5-1.0 percentage points, representing significant below-ground carbon storage.
Japanese rice paddies are recognized as important wetland ecosystems, supporting diverse communities of amphibians, insects, fish, and birds. The Satoyama Initiative (里山イニシアティブ) promotes the conservation of these agricultural-natural mosaics. Green manure crops like sesbania enhance paddy biodiversity by providing habitat and food resources during the pre-transplanting period, supporting populations of beneficial organisms including frogs, dragonflies, and predatory beetles.
Japan's plant quarantine system, administered by the Plant Protection Station (植物防疫所) under MAFF, requires all imported seeds to undergo inspection upon arrival. Kohenoor International provides comprehensive documentation to ensure smooth customs clearance:
| Route | Transit | Min. Order | Best For |
|---|---|---|---|
| Sea: Karachi → Yokohama (横浜) | 14-20 days | 500 kg | Kanto region |
| Sea: Karachi → Kobe (神戸) | 14-18 days | 500 kg | Kansai/Western Japan |
| Sea: Karachi → Hakata (博多) | 12-16 days | 500 kg | Kyushu region |
| FCL (20-ft container) | 14-20 days | 18-20 MT | JA cooperatives, bulk |
| Air: Karachi → Narita (成田) | 2-3 days | 50 kg | Trial/urgent orders |
コヒヌール・インターナショナルは、日本の植物検疫要件に完全に適合した書類を整備しています。植物検疫証明書、種子品質分析証明書（発芽率85%以上、純度98%以上、水分含量10%以下）、非遺伝子組み換え証明書、原産地証明書、くん蒸証明書を全ての出荷に添付いたします。CIF横浜・神戸・博多価格でのご提供が可能です。
Japan Agricultural Cooperatives (JA, 農業協同組合) play a central role in Japanese agriculture, managing input procurement, crop marketing, and technical extension services for their member farmers. Kohenoor International has experience supplying sesbania seeds through JA procurement systems.
JA cooperatives typically plan their green manure seed procurement in late winter (January-March) for delivery in April-May. County-level JA branches consolidate member requirements and issue purchase orders, often coordinating with prefectural JA federations for bulk procurement at favorable prices.
For JA cooperatives interested in sesbania seed procurement, Kohenoor International offers:
Japan has positioned itself as a leader in sustainable agriculture through the MAFF "Green Food System Strategy" (みどりの食料システム戦略), which sets ambitious targets for 2050 including a 50% reduction in chemical fertilizer use and expansion of organic farmland to 1 million hectares (25% of total arable land). Sesbania green manuring directly supports multiple elements of this strategy:
Sesbania improves soil fertility and rice yields sustainably, contributing to long-term food production security without depleting soil resources.
Replacing energy-intensive synthetic fertilizers with biologically fixed nitrogen reduces the environmental footprint of rice production.
Soil carbon sequestration through green manuring and avoided GHG emissions from fertilizer manufacturing contribute to climate mitigation.
Enhanced soil biodiversity and paddy ecosystem health through organic matter addition and reduced chemical inputs.
Premium sesbania seeds delivered to Yokohama, Kobe, or any Japanese port. Full phytosanitary documentation. JAS organic compatible.
横浜、神戸、その他日本の港への配送可能。完全な植物検疫書類。有機JAS認証対応。
Kohenoor International — Pakistan's leading sesbania seed exporter since 1957 | Hyderabad, Pakistan | Exports to 70+ countries
Sesbania is used as a summer green manure crop (緑肥作物) in rice paddy rotations. Sown in May and grown for 45-60 days, it fixes 80-120 kg N/ha. It is especially valued in JAS organic rice production.
はい、可能です。コヒヌール・インターナショナルは、日本の植物防疫法に基づく植物検疫証明書および品質証明書を完備し、セスバニア種子を日本向けに輸出しています。カラチ港から横浜港までの海上輸送期間は約14-20日です。
Yes. Green manure crops are explicitly approved inputs under JAS organic rules. Our seeds are non-GMO and untreated, meeting all JAS organic requirements.
Sesbania cannabina and Sesbania rostrata are most commonly used. S. cannabina offers rapid biomass production, while S. rostrata provides unique stem nodulation for nitrogen fixation in flooded conditions. We supply both species.
海上輸送の場合は最小500kg、航空輸送の場合は最小50kgから対応可能です。コンテナ単位（約18-20トン）の大量注文には割引価格を適用いたします。お問い合わせはusman@kohenoorint.comまで。
Sea freight from Karachi to Yokohama, Kobe, or Hakata ports (14-20 days). Air freight to Narita for urgent orders (2-3 days, minimum 50 kg). CIF pricing available for all Japanese ports.
Sesbania for Korean rice paddies and organic farming — similar green manure traditions.
Global guide to sesbania as green manure in rice systems, including Japan-specific data.
Sesbania for organic certification worldwide, including JAS organic.
Scientific specifications, trial data, and agronomic parameters for sesbania varieties.